New results on focusing of gamma-rays with Laue lenses (2009)
Ferrari, F., Frontera, F., Loffredo, G., Virgilli, E., Guidorzi, C., Carassiti, V., ...
We report on new results on the development activity of broad band Laue lenses for hard X-/gamma-ray astronomy (70/100-600 keV). After the development of a first prototype, whose performance was...
Spectral evolution of GRBs observed with BeppoSAX WFCs and GRBM (2009)
Frontera, F., Amati, L., Guidorzi, C., Landi, R., La Parola, V.
We present some preliminary results obtained from a systematic analysis of almost all GRBs simultaneously observed with the Gamma Ray Burst Monitor and the Wide Field Cameras aboard the BeppoSAX...
The Interplanetary Network Supplement to the HETE-2 Gamma-Ray Burst Catalog (2009)
Hurley, K., Barraud, C., Pelangeon, A., Boer, M., Vanderspek, R., ...
Between 2000 November and 2006 May, one or more spacecraft of the interplanetary network (IPN) detected 226 cosmic gamma-ray bursts that were also detected by the FREGATE experiment aboard the...
Extremely energetic Fermi Gamma-Ray Bursts obey spectral energy correlations (2009)
Amati, L., Frontera, F., Guidorzi, C.
The extremely energetic Fermi GRBs 080916C, with its Eiso of ~ 10^{55} erg in 1 keV - 10 GeV and intense GeV emission, and 090323 give us a unique opportunity to test the reliability and extension of...
The Gamma--Ray Burst catalog obtained with the Gamma Ray Burst Monitor aboard BeppoSAX (2008)
Frontera, F., Guidorzi, C., Montanari, E., Rossi, F., Costa, E., Feroci, M., ...
We report on the catalog of Gamma--Ray Bursts (GRBs) detected with the Gamma Ray Burst Monitor aboard the BeppoSAX satellite. It includes 1082 GRBs with 40--700 keV fluences in the range from...
Focusing of gamma-rays with Laue lenses: first results (2008)
Frontera, F., Loffredo, G., Pisa, A., Nobili, F., Carassiti, V., Evangelisti, F., ...
We report on the first results obtained from our development project of focusing gamma-rays ($>$60 keV) by using Laue lenses. The first lens prototype model has been assembled and tested. We describe...
Romano, P., Guidorzi, C., Sidoli, L., Montanari, E., Capitanio, F., Amati, L., ...
During our Swift/XRT program to obtain X-ray positions at arcsecond level for a sample of Galactic X-ray binaries, we discovered that SAX J0840.7+2248 is not a binary, but rather BeppoSAX/WFC+GRBM...
Measuring the cosmological parameters with the Ep,i-Eiso correlation of Gamma-Ray Bursts (2008)
Amati, L., Guidorzi, C., Frontera, F., Della Valle, M., Finelli, F., Landi, R., ...
We have used the Ep,i-Eiso correlation of GRBs to measure the cosmological parameter Omega_M. By adopting a maximum likelihood approach which allows us to correctly quantify the extrinsic (i.e....
Farinelli, R., Titarchuk, L., Paizis, A., Frontera, F.
We developed a new model for the X-ray spectral fitting \xspec package which takes into account the effects of both thermal and dynamical (i.e. bulk) Comptonization. The model consists of two...
Rossi, F., Guidorzi, C., Amati, L., Frontera, F., Romano, P., Campana, S., ...
Using a sample of 14 BeppoSAX and 74 Swift GRBs with measured redshift we tested the correlation between the intrinsic peak energy of the time-integrated spectrum, E_p,i, the isotropic-equivalent...
The broad-lined type Ic supernova 2003jd (2008)
Valenti, S., Benetti, S., Cappellaro, E., Patat, F., Mazzali, P., Turatto, M., ...
The results of a worldwide coordinated observational campaign on the broad-lined Type Ic supernova (SN Ic) 2003jd are presented. In total, 74 photometric data points and 26 spectra were collected...
The search for muon neutrinos from northern hemisphere gamma-ray bursts with AMANDA (2008)
Achterberg, A., Ackermann, M., Adams, J., Ahrens, J., Andeen, K., Auffenberg, J., ...
The broad-lined type Ic supernova 2003jd (2008)
Valenti, S., Benetti, S., Cappellaro, E., Patat, F., Mazzali, P., Turatto, M., ...
The search for muon neutrinos from northern hemisphere gamma-ray bursts with amanda (2008)
Achterberg, A., Ackermann, M., Adams, J., Ahrens, J., Andeen, K., Auffenberg, J., ...
The search for muon neutrinos from northern hemisphere gamma-ray bursts with amanda (2008)
ACHTERBERG, A, ACKERMANN, M, ADAMS, J, AHRENS, J, ANDEEN, K, AUFFENBERG, J, ...
Development status of a Laue lens project for gamma-ray astronomy (2007)
Frontera, F., Loffredo, G., Pisa, A., Milani, L., Nobili, F., Auricchio, N., ...
We report the status of the HAXTEL project, devoted to perform a design study and the development of a Laue lens prototype. After a summary of the major results of the design study, the approach...
Evidence for Diverse Optical Emission from Gamma-Ray Burst Sources (2007)
Pedersen Copenhagen, H. Pedersen, M. I. Andersen, M. Lacy, A. M. Perez, ...
Optical Transients from gamma-ray burst sources, in addition to offering a distance determination, convey important information on the physics of the emission mechanism, and perhaps also about the...
The Broad-lined Type Ic SN 2003jd (2007)
Valenti, S., Benetti, S., Cappellaro, E., Patat, F., Mazzali, P., Turatto, M., ...
The results of a world-wide coordinated observational campaign on the broad-lined Type Ic SN 2003jd are presented. In total, 74 photometric data points and 26 spectra were collected using 11...
Unveiling GRB hard X-ray afterglow emission with Simbol-X (2007)
Amati, L., Maiorano, E., Palazzi, E., Landi, R., Frontera, F., Masetti, N., ...
Despite the enormous progress occurred in the last 10 years, the Gamma-Ray Bursts (GRB) phenomenon is still far to be fully understood. One of the most important open issues that have still to be...
D'Elia, V., Fiore, F., Meurs, E., Chincarini, G., Melandri, A., Norci, L., ...
We analyze high resolution spectroscopic observations of the optical afterglow of GRB050730, obtained with UVES@VLT about hours after the GRB trigger. The spectrum shows that the ISM of the GRB host...
D'Elia, V., Fiore, F., Meurs, E., Chincarini, G., Melandri, A., Norci, L., ...
We analyze high resolution spectroscopic observations of the optical afterglow of GRB050730, obtained with UVES@VLT about hours after the GRB trigger. The spectrum shows that the ISM of the GRB host...
D'Elia, V., Fiore, F., Meurs, E., Chincarini, G., Melandri, A., Norci, L., ...
We analyze high resolution spectroscopic observations of the optical afterglow of GRB050730, obtained with UVES@VLT about hours after the GRB trigger. The spectrum shows that the ISM of the GRB host...
Bel, M. Cadolle, Ribo, M., Rodriguez, J., Chaty, S., Corbel, S., Goldwurm, A., ...
We report the results of simultaneous multiwavelength observations of the X-ray transient source SWIFT J1753.5-0127 performed with INTEGRAL, RXTE, NTT, REM and VLA on 2005 August 10-12. The source,...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2007)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
Farinelli, R., Titarchuk, L., Frontera, F.
We report results of a new spectral analysis of two BeppoSAX observations of the Z source GX 17+2. In one of the two observations the source exhibits a powerlaw-like hard (> 30 keV) X-ray tail which...
D'Elia, V., Fiore, F., Meurs, E.J.A., Chincarini, G., Melandri, A., Norci, Laura, ...
Aims. The aim of this paper is to study the Gamma Ray Burst (GRB) environment through the analysis of the optical absorption features due to the gas surrounding the GRB. Methods. To this purpose we...
D'Elia, V., Fiore, F., Meurs, E.J.A., Chincarini, G., Melandri, A., Norci, Laura, ...
Aims. The aim of this paper is to study the Gamma Ray Burst (GRB) environment through the analysis of the optical absorption features due to the gas surrounding the GRB. Methods. To this purpose we...
On the temporal variability classes found in long gamma-ray bursts with known redshift (2007)
Borgonovo, L., Frontera, F., Guidorzi, C., Montanari, E., Vetere, L., Soffitta, P.
Based on the analysis of a small sample of BATSE and Konus gamma-ray bursts (GRBs) with know redshift it has been reported that the width of the autocorrelation function (ACF) shows a remarkable...
Paizis, A., Farinelli, R., Titarchuk, L., Courvoisier, T. J. -L., Bazzano, A., Beckmann, V., ...
We studied and compared the long-term average hard X-ray (>20keV) spectra of a sample of twelve bright low-mass X-ray binaries hosting a neutron star (NS). Our sample comprises the six well studied...
Bel, M. Cadolle, Ribo, M., Rodriguez, J., Chaty, S., Corbel, S., Goldwurm, A., ...
We report the results of simultaneous multiwavelength observations of the X-ray transient source SWIFT J1753.5-0127 performed with INTEGRAL, RXTE, NTT, REM and VLA on 2005 August 10-12. The source,...
X-ray broad-band study of the symbiotic X-ray binary 4U 1954+31 (2006)
Masetti, N., Rigon, E., Maiorano, E., Cusumano, G., Palazzi, E., Orlandini, M., ...
(Abridged) We present results of several X-ray observations of the X-ray binary 4U 1954+31 performed with the satellites BeppoSAX, EXOSAT, ROSAT, RXTE, and Swift. We also studied the RXTE ASM data...
Gamma-ray lens development status for a European Gamma-Ray Imager (2006)
Frontera, F., Pisa, A., Carassiti, V., Evangelisti, F., Loffredo, G., Pellicciotta, D., ...
A breakthrough in the sensitivity level of the hard X-/gamma-ray telescopes, which today are based on detectors that view the sky through (or not) coded masks, is expected when focusing optics will...
A Hard X-ray View on Scorpius X-1 with INTEGRAL: non-Thermal Emission ? (2006)
Di Salvo, T., Goldoni, P., Stella, L., Bazzano, A., Burderi, L., ...
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z-track of the...
An optical supernova associated with the X-ray flash XRF 060218 (2006)
Pian, E., Mazzali, P. A., Masetti, N., Ferrero, P., Klose, S., Palazzi, E., ...
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae(1) that are more luminous than average(2-5) and that eject material at very high velocities. Less-luminous supernovae were...
A Hard X-ray View on Scorpius X-1 with INTEGRAL: non-Thermal Emission ? (2006)
Di Salvo, T., Goldoni, P., Stella, L., Bazzano, A., Burderi, L., ...
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z-track of the...
Paizis, A., Farinelli, R., Titarchuk, L., Courvoisier, T. J. -L., Bazzano, A., Beckmann, V., ...
We studied and compared the long-term average hard X-ray (>20keV) spectra of a sample of twelve bright low-mass X-ray binaries hosting a neutron star (NS). Our sample comprises the six well studied...
On the consistency of the peculiar GRBs 060218 and 060614 with the Ep,i - Eiso correlation (2006)
Amati, L., Della Valle, M., Frontera, F., Malesani, D., Guidorzi, C., Montanari, E., ...
We analyze and discuss the position of GRB 060218 and GRB 060614 in the Ep,i - Eiso plane. GRB 060218 is important because of its similarity with GRB 980425, the proto-type event of the GRB-SN...
The slope of the GRB Variability/Peak Luminosity Correlation (2006)
Guidorzi, C., Frontera, F., Montanari, E., Rossi, F., Amati, L., Gomboc, A., ...
From a sample of 32 GRBs with known redshift (Guidorzi et al. 2005) and then a sample of 551 BATSE GRBs with derived pseudo-redshift (Guidorzi 2005), the time variability/peak luminosity correlation...
The gamma-ray burst monitor for Lobster-ISS (2006)
Amati, L., Frontera, F., Auricchio, N., Caroli, E., Basili, A., Bogliolo, A., ...
Lobster-ISS is an X-ray all-sky monitor experiment selected by ESA two years ago for a Phase A study (now almost completed) for a future flight (2009) aboard the Columbus Exposed Payload Facility of...
Physics of the GRB 030328 afterglow and its environment (2006)
Maiorano, E., Masetti, N., Palazzi, E., Savaglio, S., Rol, E., Vreeswijk, P. M., ...
We report on the photometric, spectroscopic and polarimetric, monitoring of the optical afterglow of Gamma-Ray Burst (GRB) 030328 detected by HETE-2. Photometry, collected at 7 different telescopes,...
An optical supernova associated with the X-ray flash XRF 060218 (2006)
Pian, E., Mazzali, P. A., Masetti, N., Ferrero, P., Klose, S., Palazzi, E., ...
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supernovae were not...
M-type giants as optical counterparts of X-ray sources 4U 1700+24 and 4U 1954+319 (2006)
Masetti, N., Orlandini, M., Palazzi, E., Amati, L., Frontera, F.
We observed with Chandra two peculiar galactic X-ray sources, 4U 1700+24 and 4U 1954+319, which are suspected to have a M-type giant star as optical counterpart, in order to get an high-precision...
A Hard X-ray View on Scorpius X-1 with INTEGRAL: non-Thermal Emission ? (2006)
Di Salvo, T., Goldoni, P., Stella, L., Bazzano, A., Burderi, L., ...
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z-track of the...
An optical supernova associated with the X-ray flash XRF 060218 (2006)
Pian, E., Mazzali, P. A., Masetti, N., Ferrero, P., Klose, S., Palazzi, E., ...
A Hard X-Ray View of Scorpius X-1 with INTEGRAL: Nonthermal Emission? (2006)
Salvo, T. Di, Goldoni, P., Stella, L., Klis, M. Van Der, Bazzano, A., Burderi, L., ...
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1 and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z track of the X-ray...
Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211. (2006)
Vreeswijk, P.M., Smette, A., Fruchter, S., Palazzi, E., Rol, E., ...
An optical supernova associated with the X-ray flash XRF 060218 (2006)
Pian, E., Mazzali, P.A., Masetti, N., Ferrero, P., Klose, S., Palazzi, E., ...
Long-duration gamma-ray bursts (GRBs) are associated with type Ic supernovae that are more luminous than average and that eject material at very high velocities. Less-luminous supernovae were not...
A Hard X-Ray View of Scorpius X-1 with INTEGRAL: Nonthermal Emission? (2006)
Salvo, T. Di, Goldoni, P., Stella, L., Klis, M. Van Der, Bazzano, A., Burderi, L., ...
We present here simultaneous INTEGRAL/RXTE observations of Sco X-1 and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z track of the X-ray...
Laue Lens Development for Hard X-rays (>60 keV) (2005)
Pellicciotta, D., Frontera, F., Loffredo, G., Pisa, A., Andersen, K., Courtois, P., ...
Results of reflectivity measurements of mosaic crystal samples of Cu (111) are reported. These tests were performed in the context of a feasibility study of a hard X-ray focusing telescope for space...
Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211 (2005)
Vreeswijk, P. M., Smette, A., Fruchter, A. S., Palazzi, E., Rol, E., ...
We present low-resolution VLT spectroscopy of the afterglow of the gamma-ray bursts (GRBs) 991216, 011211 and 021211. Our spectrum of GRB991216 is the only optical spectrum for this afterglow. It...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Swift XRT Observations of the Breaking X-ray Afterglow of GRB 050318 (2005)
Perri, M., Giommi, P., Capalbi, M., Amati, L., Frontera, F., Chincarini, G., ...
We report the results of Swift X-Ray Telescope (XRT) observations of GRB 050318. This event triggered the Burst Alert Telescope (BAT) aboard Swift and was followed-up with XRT and UVOT for 11...
The BeppoSAX view on the galactic high-mass X-ray binary 4U 0114+65 (2005)
Masetti, N., Orlandini, M., Fiume, D. Dal, Del Sordo, S., Amati, L., Frontera, F., ...
A pointed observation on the galactic high-mass X-ray binary 4U 0114+65 was carried out with BeppoSAX in order to compare the X-ray spectral and timing characteristics observed by this satellite over...
The BeppoSAX catalog of GRB X-ray afterglow observations (2005)
De Pasquale, M., Piro, L., Gendre, B., Amati, L., Antonelli, L. A., Costa, E., ...
We present the X-ray afterglow catalog of BeppoSAX from the launch of the satellite to the end of the mission. Thirty-three X-ray afterglows were securely identified based on their fading behavior...
The GRB Variability/Peak Luminosity Correlation: new results (2005)
Guidorzi, C., Frontera, F., Montanari, E., Rossi, F., Amati, L., Gomboc, A., ...
We report test results of the correlation between time variability and peak luminosity of Gamma-Ray Bursts (GRBs), using a larger sample (32) of GRBs with known redshift than that available to...
A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy (2005)
Lamb, D. Q., Ricker, G. R., Lazzati, D., Ghirlanda, G., Ghisellini, G., Firmani, C., ...
[Abridged] Very recently, relations between the peak energy of Gamma-Ray Burst burst spectra, the isotropic-equivalent energy of the burst, and the radiated energy of the burst have been found. In a...
Exploring the Hard X-/soft gamma-ray Continuum Spectra with Laue Lenses (2005)
Frontera, F., Pisa, A., De Chiara, P., Loffredo, G., Pellicciotta, D., Carassiti, V., ...
The history of X-ray astronomy has shown that any advancement in our knowledge of the X-ray sky is strictly related to an increase in instrument sensitivity. At energies above 60 keV, there are...
SN/GRB connection: a statistical approach with BATSE and Asiago Catalogues (2005)
Valenti, S., Cappellaro, E., Della Valle, M., Frontera, F., Guidorzi, C., Montanari, E.
Recent observations suggest that some types of GRB are physically connected with SNe of type Ib/c. However, it has been pointed out by several authors that some GRBs could be associated also with...
The GRB of 1999 January 23: prompt emission and broad-band afterglow modeling (2005)
Corsi, A., Piro, L., Kuulkers, E., Amati, L., Antonelli, L. A., Costa, E., ...
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright gamma-ray burst (GRB) 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and...
GRB990123: multiwavelength afterglow study (2005)
Maiorano, E., Masetti, N., Palazzi, E., Frontera, F., Grandi, P., Pian, E., ...
We report on the BeppoSAX and multiwavelength data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123. Mainly due to its exceptional brightness, this is the only source for which the Wide...
Masetti, N., Palazzi, E., Pian, E., Hunt, L., Fynbo, J. P. U., Gorosabel, J., ...
We present the results of an optical and near-infrared (NIR) monitoring campaign of the counterpart of Gamma-Ray Burst (GRB) 000911, located at redshift z=1.06, from 5 days to more than 13 months...
The puzzling case of GRB 990123: multiwavelength afterglow study (2005)
Maiorano, E., Masetti, N., Palazzi, E., Frontera, F., Grandi, P., Pian, E., ...
We report on the BeppoSAX data analysis of the afterglow of Gamma-Ray Burst (GRB) 990123, one of the brightest GRBs detected by BeppoSAX. Mainly due to its exceptional brightness, this is the only...
The puzzling case of GRB 990123: prompt emission and broad-band afterglow modeling (2005)
Corsi, A., Piro, L., Kuulkers, E., Amati, L., Antonelli, L. A., Costa, E., ...
We report on BeppoSAX simultaneous X- and gamma-ray observations of the bright GRB 990123. We present the broad-band spectrum of the prompt emission, including optical, X- and gamma-rays, confirming...
The transient hard X-ray tail of GX 17+2: new BeppoSAX results (2005)
Farinelli, R., Frontera, F., Zdziarski, A. A., Stella, L., Zhang, S. N., ...
We report on results of two BeppoSAX observations of the Z source GX 17+2. In both cases the source is in the horizontal branch of the colour-intensity diagram. The persistent continuum can be fit by...
The transient hard X-ray tail of GX 17+2: New BeppoSAX results (2005)
Farinelli, R., Frontera, F., Zdziarski, A.A., Stella, L., Zhang, S.N., Klis, M. Van Der, ...
We report on results of two BeppoSAX observations of the Z source GX 17+2. In both cases the source is in the horizontal branch of the colour-intensity diagram. The persistent continuum can be fit by...
Iaria, R., Spano, M., Salvo, T. Di, Robba, N.R., Burderi, L., Fender, R.P., ...
We report on a 300 ks BeppoSAX (0.12-200 keV) observation of Circinus X-1 (Cir X-1) at phases between 0.62 and 0.84 and on a 90 ks BeppoSAX observation of Cir X-1 at phases 0.11-0.16. Using the...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2005)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
Two-phase X-ray burst from GX 3+1 observed by INTEGRAL (2005)
Chenevez, J., Falanga, M., Brandt, S., Farinelli, R., Frontera, F., Goldwurm, A., ...
We present an analysis of an anomalously long X-ray burst from the low-mass X-ray binary system GX~3+1 observed by INTEGRAL on August 31, 2004. The burst is characterized by two distinct phases: an...
Swift XRT observations of the breaking X-ray afterglow of GRB 050318 (2005)
Perri, M., Giommi, Paolo, Capalbi, M., Amati, L., Frontera, F., Chincarini, Guido, ...
The definitive version of this paper is available from www.edpsciences.org/aa
Piro, L., De Pasquale, M., Soffitta, P., Lazzati, D., Amati, L., Costa, E., ...
In this paper we present BeppoSax and XMM observations of two long Gamma-ray bursts, the X-ray rich event of December 11, 2001 (GRB011211) and the hard and very bright event of November 21, 2001...
GRB 040403: a faint X-ray rich Gamma-ray Burst discovered by INTEGRAL (2004)
Mereghetti, S., Gotz, D., Andersen, M. I., Castro-Tirado, A., Frontera, F., Gorosabel, J., ...
GRB 040403 is one of the faintest gamma-ray bursts for which a rapid and accurate localization has been obtained. Here we report on the gamma-ray properties of this burst, based on observations with...
Feasibility study of a Laue lens for hard X-rays for space astronomy (2004)
Pisa, A., Frontera, F., De Chiara, P., Loffredo, G., Pellicciotta, D., Landini, G., ...
We report on the feasibility study of a Laue lens for hard X-rays (>60 keV)based on mosaic crystals, for astrophysical applications. In particular we discuss the scientific motivations, its...
On the Soft Excess in the X-ray Spectrum of Cir X-1: Revisitation of the Distance to Cir X-1 (2004)
Iaria, R., Spano', M., Di Salvo, T., Robba, N. R., Burderi, L., Fender, R., ...
We report on a 300 ks BeppoSAX (0.12-200 keV) observation of Circinus X-1 (Cir X-1) at phases between 0.62 and 0.84 and on a 90 ks BeppoSAX observation of Cir X--1 at phases 0.11-0.16. Using the...
A flash in the dark: UVES/VLT high resolution spectroscopy of GRB afterglows (2004)
Fiore, F., D'Elia, V., Lazzati, D., Perna, R., Sbordone, L., Stratta, G., ...
We present the first high resolution (R=20000--45000, corresponding to 14 km/s at 4200A to 6.6 km/s at 9000A) observations of the optical afterglow of Gamma Ray Bursts. GRB020813 and GRB021004 were...
Hurley, K., Stern, B., Kommers, J., Cline, T., Mazets, E., Golenetskii, S., ...
We present Interplanetary Network (IPN) detection and localization information for 211 gamma-ray bursts (GRBs) observed as untriggered events by the Burst and Transient Source Experiment (BATSE), and...
Astone, P., Babusci, D., Bassan, M., Carelli, P., Coccia, E., Cosmelli, C., ...
The statistical association between the output of the Gravitational Wave (GW) detectors EXPLORER and NAUTILUS and a list of Gamma Ray Bursts (GRBs) detected by the satellite experiments BATSE and...
The prompt X-ray emission of GRB011211: possible evidence of a transient absorption feature (2004)
Frontera, F., Amati, L., Lazzati, D., Konigl, A., Vietri, M., ...
We report on observation results of the prompt X- and gamma-ray emission from GRB011211. This event was detected with the Gamma-Ray Burst Monitor and one of the Wide Field Cameras aboard the BeppoSAX...
The discovery of hard X-ray emission in the persistent flux of the Rapid Burster (2004)
Falanga, M., Farinelli, R., Goldoni, P., Frontera, F., Goldwurm, A., Stella, L.
We report the first detection with INTEGRAL of persistent hard X-ray emission (20 to 100 keV) from the Rapid Burster (MXB 1730-335), and describe its full spectrum from 3 to 100 keV. The source was...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27 (2004)
Amati, L., Frontera, F., Capalbi, M., Landi, R., Soffitta, P., ...
We report on the X-ray observations of the X-ray flash (XRF) which occurred on 2002 April 27, three days before BeppoSAX was switched off. The event was detected with the BeppoSAX Wide Field Cameras...
A decreasing column density during the prompt emission from GRB000528 observed with BeppoSAX (2004)
Frontera, F., Amati, L., Lazzati, D., Montanari, E., Orlandini, M., Perna, R., ...
We report observation results of the prompt X-- and $\gamma$--ray emission from GRB 000528. This event was detected with the Gamma-Ray Burst Monitor and one of the two Wide Field Cameras aboard the...
INTEGRAL monitoring of the Black Hole candidate 1E 1740.7-2942 (2004)
Del Santo, M., Bazzano, A., Smith, D. M., Bassani, L., Bird, A. J., Bouchet, L., ...
The brightest persistent Galactic black hole candidate close to the Galactic Centre, 1E 1740.7-2942, has long been observed with INTEGRAL. In this paper, we report on the long-term hard X-ray...
The INTEGRAL LMXRB Monitoring Programme (2004)
Paizis, A., Courvoisier, T. J. -L., Vilhu, O., Chernyakova, M., Tikkanen, T., Bazzano, A., ...
Our collaboration is responsible for the study of a sample of 72 low mass X-ray binaries (LMXRB) using the INTEGRAL Core Programme data. In this paper we describe the monitoring programme we have...
Serpens X-1 observed by INTEGRAL (2004)
Masetti, N., Foschini, L., Palazzi, E., Beckmann, V., Lund, N., Brandt, S., ...
Here we report results of an INTEGRAL-AO1 observation of the X-ray burst and atoll source Ser X-1 performed in May 2003. The object was observed for a total on-source time of 400 ks but nearly 8...
The INTEGRAL view of the Soft Gamma-ray Repeater SGR 1806-20 (2004)
Gotz, D., Mereghetti, S., Mirabel, I. F., Hurley, K., Brandt, S., Lund, N., ...
We present the results obtained by INTEGRAL on the Soft-Gamma Ray Repeater SGR 1806-20. In particular we report on the temporal and spectral properties of the bursts detected during a moderately...
A look with BeppoSAX at the low-luminosity Galactic X-ray source 4U 2206+54 (2004)
Masetti, N., Fiume, D. Dal, Amati, L., Del Sordo, S., Frontera, F., Orlandini, M., ...
A pointed observation of the low-luminosity galactic source 4U 2206+54 was carried out in November 1998 with BeppoSAX. The light curve of 4U 2206+54 shows erratic variability on a timescale of about...
Multiwavelength study of the very long GRB 020410 (2004)
Nicastro, L., Amati, L., Mazets, E., Castro-Tirado, A., Gorosabel, J., ...
GRB 020410 is by far the longest gamma-ray burst (with a duration of about 1600 s) to have been followed up from the X-ray through the radio regime. Afterglow emission was detected in X-rays and at...
Hard X-ray emission from Serpens X-1 as observed by INTEGRAL (2004)
Masetti, N., Foschini, L., Palazzi, E., Amati, L., Caroli, E., Di Cocco, G., ...
We here report results of an INTEGRAL observation of the X-ray burst and atoll source Ser X-1 performed on May 2003. The object was observed for a total of 400 ks but nearly 8 degrees off-axis due to...
A new BeppoSAX observation of the Z Source GX 349+2 (2004)
Iaria, R., Salvo, T. Di, Robba, N.R., Burderi, L., Lavagetto, G., Stella, L., ...
Presence of a soft excess between 0.6 keV and 0.9 keV in the energy spectrum of Cir X-1 (2004)
Spano, P., Iaria, R., Salvo, T. Di, Robba, N.R., Burderi, L., Stella, L., ...
INTEGRAL Observations of SGR1806-20 (2004)
Hurley, K., Mazets, E., Golenetskii, S., Frederiks, D.D., Boer, M., ...
Iaria, R., Di Salvo, T., Robba, N.R., Burderi, L., Stella, L., Frontera, F., ...
We report on the results from two BeppoSAX observations of the Z source GX 349+2 performed in 2001 February and covering the broad energy range 0.12-200 keV. The light curve obtained from these...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
Bel, M. Cadolle, Rodriguez, J., Sizun, P., Farinelli, R., Del Santo, M., Goldwurm, A., ...
We report the results of extensive high-energy observations of the X-ray transient and black hole candidate XTE J1720-318 performed with INTEGRAL, XMM-Newton and RXTE. The source, which underwent an...
The optical/near-IR spectral energy distribution of the GRB 000210 host galaxy (2004)
Gorosabel, J., Christensen, L., Hjorth, J., Fynbo, J. U., Pedersen, H., Jensen, B. L., ...
The INTEGRAL view of the soft gamma-ray repeater SGR 1806-20 (2004)
Götz, D., Mereghetti, S., Mirabel, I. F., Hurley, K., Brandt, S., Lund, N., ...
Guidorzi, C., Frontera, F., Montanari, E., Feroci, M., Amati, L., Costa, E., ...
We report on spectral and temporal results of the 40-700 keV observations, obtained with the Gamma-Ray Burst Monitor (GRBM) on board BeppoSAX, of the two large flares from the Soft Gamma-ray Repeater...
X-ray/optical observations of A0535+26/HDE 245770 in quiescence (2003)
Orlandini, M., Bartolini, C., Campana, S., Del Sordo, S., De Martino, D., Frontera, F., ...
We present the result of three BeppoSAX observations of the X-ray binary pulsar A0535+26 in its quiescent state. The source is quite well detected up to 200 keV (6 sigma detection in the stronger...
First INTEGRAL Observations of Eight Persistent Neutron Star Low Mass X-ray Binaries (2003)
Paizis, A., Beckmann, V., Courvoisier, T. J. -L., Vilhu, O., Lutovinov, A., Ebisawa, K., ...
Early results from the INTEGRAL Core Program, for a sample of eight persistently bright neutron star low mass X-ray binaries in the energy range from 5 keV to 200 keV are presented. It is shown that...
Observation of GRB 030131 with the INTEGRAL satellite (2003)
Gotz, D., Mereghetti, S., Hurley, K., Deluit, S., Feroci, M., Frontera, F., ...
A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted $\sim$150 seconds, occurred during a...
Iaria, R., Di Salvo, T., Robba, N. R., Burderi, L., Stella, L., Frontera, F., ...
We report on the results from two BeppoSAX observations of the Z source GX 349+2 performed in February 2001 and covering the broad energy range 0.12-200 keV. The light curve obtained from these...
The blue host galaxy of the red GRB 000418 (2003)
Gorosabel, J., Klose, S., Christensen, L., Fynbo, J. P. U., Hjorth, J., Greiner, J., ...
We report on multi-band (UBVRIZJsKs) observations of the host galaxy of the April 18, 2000 gamma-ray burst. The Spectral Energy Distribution (SED) is analysed by fitting empirical and synthetic...
The 2001 April Burst Activation of SGR 1900+14: Pulse Properties and Torque (2003)
Woods, P. M., Kouveliotou, C., Gogus, E., Finger, M. H., Feroci, M., Mereghetti, S., ...
We report on observations of SGR 1900+14 made with the Rossi X-ray Timing Explorer (RXTE) and BeppoSAX during the April 2001 burst activation of the source. Using these data, we measure the spindown...
X/gamma-ray measurements of the faint GRB 020321 (2003)
Kuiper, L., Heise, J., Amati, L., Costa, E., Feroci, M., ...
GRB 020321 is a faint GRB that received wide follow-up attention in X-rays (BeppoSAX/NFI, Chandra/ACIS-S, XMM-Newton), radio (ATCA) and optical (ESO, HST). We identify a weak X-ray afterglow by a...
Long and faint GRBs in archival BeppoSAX-WFC data (2003)
Heise, J., Kippen, R. M., Woods, P. M., Guidorzi, C., Montanari, E., ...
In an ongoing effort to search for X-ray transients on diverse time scales in the data archive of the BeppoSAX Wide Field Cameras we have identified four GRBs that are long (between 540 and at least...
XMM-Newton Observations of the Field of Gamma-Ray Burst 980425 (2003)
Pian, E., Giommi, P., Amati, L., Costa, E., Danziger, J., Feroci, M., ...
The error box of GRB980425 has been observed by XMM-Newton in March 2002, with the aim of measuring the late epoch X-ray emission of the supernova 1998bw and of clarifying its supposed association...
Frontera, F., Amati, L., Zdziarski, A. A., Belloni, T., Del Sordo, S., Masetti, N., ...
XTE J1118+480 is a well established black hole candidate with a mass estimate in the range from 7 to 10 solar masses. With BeppoSAX we observed the source 4 times, from April to December 2000....
Optical and NIR Observations of the Afterglow of GRB 020813 (2003)
Covino, S., Malesani, D., Tavecchio, F., Antonelli, L. A., Arkharov, A., Di Paola, A., ...
We present optical and near-infrared (NIR) photometry of the bright afterglow of GRB 020813. Our data span from 3 hours to 4 days after the GRB event. A rather sharp achromatic break is present in...
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L. K., Maiorano, E., ...
(Abridged) We report on observations of the optical and NIR afterglow of GRB020405. Ground-based optical observations started about 1 day after the GRB and spanned a period of ~10 days; archival HST...
Multiwavelength observations of the GRB000615 field (2003)
Maiorano, E., Masetti, N., Palazzi, E., Nicastro, L., Pian, E., Amati, L., ...
We report on prompt and afterglow observations of GRB 000615 detected by BeppoSAX. The study of the high-energy prompt event is presented along with the search for its X-ray and optical afterglow....
The dark burst 010214 with BeppoSAX: possible variable absorption and jet X-ray emission (2003)
Guidorzi, C., Frontera, F., Montanari, E., Amati, L., Antonelli, L. A., ...
We report on the prompt and afterglow emission observations of the dark burst GRB010214 with BeppoSAX. The prompt emission shows possible evidence of variable absorption from N_H = 3.0^{+5.1}_{-2.0}...
The optical/near-IR spectral energy distribution of the GRB 000210 host galaxy (2003)
Gorosabel, J., Christensen, L., Hjorth, J., Fynbo, J. U., Pedersen, H., Jensen, B. L., ...
We report on UBVRIZJsHKs-band photometry of the dark GRB 000210 host galaxy. Fitting a grid of spectral templates to its Spectral Energy Distribution (SED), we derived a photometric redshift...
BeppoSAX observations of two unclassified LMXBs: X1543-624 and X1556-605 (2003)
Farinelli, R., Frontera, F., Masetti, N., Amati, L., Guidorzi, C., Orlandini, M., ...
Observations of two unclassified Low Mass X-ray Binaries, X1543-624 and X1556-605, are presented. In the 2-10 keV band the first of the two sources is a factor two stronger than the other. Both...
BeppoSAX observations of two unclassified LMXBs: X1543-624 and X1556-605 (2003)
Farinelli, R., Frontera, F., Masetti, N., Amati, L., Guidorzi, C., Orlandini, M., ...
An INTEGRAL ToO Observation of SGR1806-20 (2003)
Hurley, K., Aptekar, R., Mazets, E., Golenetskii, S., Boer, M., ...
A multi-colour study of the dark GRB 000210 host galaxy and its environment (2003)
Gorosabel, J., Christensen, L., Hjorth, J., Fynbo, J.U., Pedersen, H., Jensen, B.L., ...
We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of...
Gorosabel, J., Fynbo, J.U., Moller, P., Hjorth, J., Pedersen, H., Christensen, L., ...
We present the results provided by an automatic colour-colour discrimination pipe-line developed to discern the different populations of objects present in GRB error boxes. We illustrate the...
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L.K., Maiorano, E., ...
We report on photometric, spectroscopic and polarimetric monitoring of the optical and near-infrared (NIR) afterglow of GRB020405. Ground-based optical observations, performed with 8 different...
The blue host galaxy of the red GRB 000418 (2003)
Gorosabel, J., Klose, S., Christensen, L., Fynbo, J.U., Hjorth, J., Greiner, J., ...
We report on multi-band (UBVRIZJsKs) observations of the host galaxy of the April 18, 2000 gamma-ray burst. The Spectral Energy Distribution (SED) is analysed by fitting empirical and synthetic...
A multi-colour study of the dark GRB 000210 host galaxy and its environment (2003)
Gorosabel, J., Christensen, L., Hjorth, J., Fynbo, J. U., Pedersen, H., Jensen, B. L., ...
The blue host galaxy of the red GRB 000418 (2003)
Gorosabel, J., Klose, S., Christensen, L., Fynbo, J. P. U., Hjorth, J., Greiner, J., ...
JEM-X : The X-ray monitor aboard INTEGRAL (2003)
Lund, N., Budtz-Jørgensen, C., Westergaard, N. J., Brandt, S., Rasmussen, I. L., Hornstrup, A., ...
JEM-X inflight performance (2003)
Brandt, S., Budtz-Jørgensen, C., Lund, N., Westergaard, N. J., Rasmussen, I. L., Andersen, K. H., ...
Optical and near-infrared observations of the GRB020405 afterglow (2003)
Masetti, N., Palazzi, E., Pian, E., Simoncelli, A., Hunt, L. K., Maiorano, E., ...
A multi-colour study of the dark GRB 000210 host galaxy and its environment (2002)
Gorosabel, J., Christensen, L., Hjorth, J., Fynbo, J. U., Pedersen, H., Jensen, B. L., ...
We present UBVRIZJsHKs broad band photometry of the host galaxy of the dark gamma-ray burst (GRB) of February 10, 2000. These observations represent the most exhaustive photometry given to date of...
A comparative study of the X-ray afterglow properties of optically bright and dark GRBs (2002)
De Pasquale, M., Piro, L., Perna, R., Costa, E., Feroci, M., Gandolfi, G., ...
We have examined the complete set of X-ray afterglow observations of dark and optically bright GRBs performed by BeppoSAX until February 2001. X-ray afterglows are detected in 90% of the cases. We do...
Gamma Ray Bursts from delayed collapse of neutron stars to quark matter stars (2002)
Berezhiani, Z., Bombaci, I., Drago, A., Frontera, F., Lavagno, A.
We propose a model to explain how a Gamma Rays Burst can take place days or years after a supernova explosion. Our model is based on the conversion of a pure hadronic star (neutron star) into a star...
Discovery of GRB 020405 and its Late Red Bump (2002)
Price, P. A., Kulkarni, S. R., Berger, E., Fox, D. W., Bloom, J. S., Djorgovski, S. G., ...
We present the discovery of GRB 020405 made with the Inter-Planetary Network (IPN). With a duration of 60 s, the burst appears to be a typical long duration event. We observed the 75-square acrminute...
Berger, E., Kulkarni, S. R., Bloom, J. S., Price, P. A., Fox, D. W., Frail, D. A., ...
We present ground-based optical observations of GRB 020124 starting 1.6 hours after the burst, as well as subsequent Very Large Array (VLA) and Hubble Space Telescope (HST) observations. The optical...
GRB 010921: Strong Limits on an Underlying Supernova from HST (2002)
Price, P. A., Kulkarni, S. R., Schmidt, B. P., Galama, T. J., Bloom, J. S., Berger, E., ...
GRB 010921 was the first HETE-2 GRB to be localized via its afterglow emission. The low-redshift of the host galaxy, z=0.451, prompted us to undertake intensive multi-color observations with the...
Astone, P., Bassan, M., Bonifazi, P., Carelli, P., Castellano, G., Coccia, E., ...
Data obtained during five months of 2001 with the gravitational wave (GW) detectors EXPLORER and NAUTILUS were studied in correlation with the gamma ray burst data (GRB) obtained with the BeppoSAX...
Intrinsic spectra and energetics of BeppoSAX Gamma-Ray Bursts with known redshifts (2002)
Amati, L., Frontera, F., Tavani, M., Antonelli, A., Costa, E., ...
We present the main results of a study of spectral and energetics properties of twelve gamma-ray bursts (GRBs) with redshift estimates. All GRBs in our sample were detected by BeppoSAX in a broad...
GRB 011121: A Massive Star Progenitor (2002)
Price, P. A., Berger, E., Reichart, D. E., Kulkarni, S. R., Subrahmanyan, R., Wark, R. M., ...
Of the cosmological gamma-ray bursts, GRB 011121 has the lowest redshift, z=0.36. More importantly, the multi-color excess in the afterglow detected in the Hubble Space Telescope (HST) light curves...
Detection of a supernova signature associated with GRB 011121 (2002)
Bloom, J. S., Kulkarni, S. R., Price, P. A., Reichart, D., Galama, T. J., Schmidt, B. P., ...
Using observations from an extensive monitoring campaign with the Hubble Space Telescope we present the detection of an intermediate-time flux excess which is redder in color relative to the...
On the Spectral Evolution of Cygnus X-2 along its Color-Color Diagram (2002)
Di Salvo, T., Farinelli, R., Burderi, L., Frontera, F., Kuulkers, E., Masetti, N., ...
We report on the results of a broad band (0.1-200 keV) spectral study of Cyg X-2 using two BeppoSAX observations taken in 1996 and 1997, respectively, for a total effective on-source time of ~100 ks....
The Current Performance of the Third Interplanetary Network (2002)
Hurley, K., Cline, T., Mitrofanov, I., Mazets, E., Golenetskii, S., Frontera, F., ...
The 3rd Interplanetary Network (IPN) has been operating since April 2001 with two distant spacecraft, Ulysses and Mars Odyssey, and numerous near-Earth spacecraft, such as BeppoSAX, Wind, and...
The bright Gamma-Ray Burst of February 10, 2000: a case study of an optically dark GRB (2002)
Piro, L., Frail, D. A., Gorosabel, J., Garmire, G., Soffitta, P., Amati, L., ...
The gamma-ray burst GRB000210 had the highest gamma-ray peak flux of any event localized by BeppoSAX as yet but it did not have a detected optical afterglow. It is therefore one of the events...
Hard X-ray Observations of Cyg X-2 with BeppoSAX (2002)
Salvo, T. Di, Klis, M. Van Der, Stella, L., Burderi, L., Farinelli, R., Frontera, F., ...
Gamma-ray bursts: the most powerful cosmic explosions (2002)
Kaper, L., Castro-Tirado, A.J., Fruchter, A., Greiner, J., Hjorth, J., Pian, E., ...
Contents: The GRACE consortium. GRBs and their afterglows. Evidence for collimation. The origin of GRBs: possible progenitors. The supernova connection. GRB host galaxies.
On the spectral evolution of Cygnus X-2 along its color-color diagram (2002)
Salvo, T. Di, Farinelli, R., Burderi, L., Frontera, F., Kuulkers, E., Masetti, N., ...
Gorosabel, J., Fynbo, J.U., Hjorth, J., Wolf, C., Andersen, M.I., Pedersen, H., ...
We report the discovery of the optical and near-infrared counterparts to GRB 001011. The GRB 001011 error box determined by Beppo-SAX was simultaneously imaged in the near-infrared by the 3.58-m New...
The bright optical afterglow of the long GRB 001007 (2002)
Castro Ceron, J.M., Castro-Tirado, A.J., Gorosabel, J., Hjorth, J., Fynbo, J.U., Jensen, B.L., ...
We present optical follow up observations of the long GRB 001007 between 6.14 hours and ~468 days after the event. An unusually bright optical afterglow (OA) was seen to decline following a steep...
The 1998 outburst of the X-ray transient XTE J2012+381 as observed with BeppoSAX (2001)
Campana, S., Stella, L., Belloni, T., Israel, G. L., Santangelo, A., Frontera, F., ...
We report on the results of a series of X-ray observations of the transient black hole candidate XTE J2012+381 during the 1998 outburst performed with the BeppoSAX satellite. The observed broad-band...
X-ray and optical monitoring of the peculiar source 4U 1700+24/V934 Her (2001)
Masetti, N., Fiume, D. Dal, Cusumano, G., Amati, L., Bartolini, C., Del Sordo, S., ...
(Abridged) We report on ASCA and BeppoSAX observations of the X-ray source 4U 1700+24 and on (quasi-)simultaneous spectroscopy of its optical counterpart, V934 Her, from the Loiano 1.5-meter...
BeppoSAX study of the X-ray binary XB 1832-330 located in the globular cluster NGC 6652 (2001)
Parmar, A. N., Oosterbroek, T., Sidoli, L., Stella, L., Frontera, F.
Results of a 2001 March 17-20 BeppoSAX observation of the X-ray binary XB 1832-330 located in the globular cluster NGC 6652 are presented. In contrast to the majority of luminous globular cluster...
The bright optical afterglow of the long GRB 001007 (2001)
Cerón, J. M. Castro, Castro-Tirado, A. J., Gorosabel, J., Hjorth, J., Fynbo, J. U., Jensen, B. L., ...
We present optical follow up observations of the long GRB 001007 between 6.14 hours and ~468 days after the event. An unusually bright optical afterglow (OA) was seen to decline following a steep...
BeppoSAX measurements of the bright gamma-ray burst 010222 (2001)
Kuiper, L.M., Amati, L., Antonelli, L.A., Butler, R.C., Costa, E., ...
Gorosabel, J., Fynbo, J. U., Hjorth, J., Wolf, C., Andersen, M. I., Pedersen, H., ...
We report the discovery of the optical and near-infrared counterparts to GRB 001011. The GRB 001011 error box determined by Beppo-SAX was simultaneously imaged in the near-infrared by the 3.58-m New...
GRB 990704: the most X-ray rich BeppoSAX gamma-ray burst (2001)
Feroci, M., Antonelli, L. A., Soffitta, P., Amati, L., Costa, E., ...
We present the X- and $\gamma$-ray detection of GRB 990704 and the discovery and study of its X-ray afterglow, 1SAX J1219.5-0350. Two pointed BeppoSAX observations with the narrow field instruments...
Frontera, F., Zdziarski, A. A., Amati, L., Mikolajewska, J., Belloni, T., Del Sordo, S., ...
We report on results of a target of opportunity observation of the X-ray transient XTE J1118+480 performed on 2000 April 14-15 with the Narrow Field Instruments (0.1-200 keV) of the SAX satellite....
Afterglow upper limits for four short duration, hard spectrum gamma-ray bursts (2001)
Hurley, K., Berger, E., Castro-Tirado, A., Cerón, J. M. Castro, Cline, T., Feroci, M., ...
We present interplanetary network localization, spectral, and time history information for four short-duration, hard spectrum gamma-ray bursts, GRB000607, 001025B, 001204, and 010119. All of these...
BeppoSAX measurements of the bright gamma-ray burst 010222 (2001)
Kuiper, L., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., ...
We analyze the BeppoSAX measurements of the prompt and afterglow emission of the gamma-ray burst GRB010222. Among 45 GRBs detected with the Wide Field Cameras on BeppoSAX, the 40-700 keV fluence of...
Nicastro, L., Cusumano, G., Antonelli, A., Amati, L., Frontera, F., Palazzi, E., ...
GRB000615 was detected simultaneously by the BeppoSAX GRBM and WFC 1 with a localization uncertainty of 2' (error circle radius). X-ray emission was detected only in the 0.1-4 keV range during a NFI...
On the absorption feature in the prompt X-ray spectrum of GRB 990705 (2001)
Lazzati, D., Ghisellini, G., Amati, L., Frontera, F., Vietri, M., Stella, L.
The absorption feature detected in the prompt X-ray emission of GRB 990705 bears important consequences. We investigate different production mechanisms and we conclude that the absorbing material...
Harrison, F. A., Yost, S. A., Sari, R., Berger, E., Axelrod, T., ...
GRB 000926 has one of the best-studied afterglows to-date, with multiple X-ray observations, as well as extensive multi-frequency optical and radio coverage. Broadband afterglow observations,...
Frontera, F., Amati, L., Vietri, M., Costa, E., Feroci, M., ...
Broadband X-Ray spectra of the persistent black hole candidates LMC X-1 and LMC X-3 (2001)
Haardt, F., Galli, M.R., Treves, A., Chiapetti, L., Dal Fiume, D., Corongiu, A., ...
The X-ray emission from Nova V382 Velorum: I. The hard component observed with BeppoSAX (2001)
Orio, M., Parmar, A., Benjamin, R., Amati, L., Frontera, F., Greiner, J., ...
We present BeppoSAX observations of Nova Velorum 1999 (V382 Vel), done in a broad X-ray band covering 0.1-300 keV only 15 days after the discovery and again after 6 months. The nova was detected at...
Frontera, F., Amati, L., Vietri, M., Costa, E., Feroci, M., ...
We report on the prompt X- and gamma-ray observations of GRB990712 with the BeppoSAX Gamma-Ray Burst Monitor and Wide Field Camera No. 2. Due to Sun constraints, we could not perform a follow-up...
GRB 990712: First Indication of Polarization Variability in a Gamma-Ray Burst Afterglow (2001)
Rol, E., Vreeswijk, P.M., Kaper, L., Galama, T.J., Paradijs, J.A. Van, ...
We report the detection of significant polarization in the optical afterglow of GRB 990712 on three instances: 0.44, 0.70, and 1.45 days after the gamma-ray burst, with (P, theta) being (2.9%+/-0.4%,...
The Metamorphosis of SN 1998bw (2001)
Patat, F., Cappellaro, E., Danziger, I.J., Mazzali, P., Sollerman, J., Augusteijn, T., ...
Discovery of a Transient Absorption Edge in the X-ray Spectrum of GRB 990705 (2000)
Amati, L., Frontera, F., Vietri, M., Soffitta, P., Costa, E., ...
We report the discovery of a transient equivalent hydrogen column density with an absorption edge at ~3.8 kiloelectron volts in the spectrum of the prompt x-ray emission of gamma-ray burst (GRB)...
Piro, L., Garmire, G., Garcia, M., Stratta, G., Costa, E., Feroci, M., ...
We report on the discovery of two emission features observed in the X-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 Dec. 1999 by the Chandra X-Ray Observatory. These features are...
Discovery of a redshifted Iron K-line in the X-ray afterglow of GRB 000214 (2000)
Antonelli, L. A., Piro, L., Vietri, M., Costa, E., Soffitta, P., Feroci, M., ...
We report the detection (3 sigma significance level) of a strong iron emission line in the X-ray spectrum of the afterglow of GRB 000214 (``Valentine's Day Burst'') observed by BeppoSAX. An emission...
Di Salvo, T., Stella, L., Robba, N. R., Burderi, L., Israel, G. L., ...
We report results of a BeppoSAX (0.1-200 keV) observation of the Z-type low mass X-ray binary GX 17+2. The source was on the so-called Horizontal and Normal branches. Energy spectra were selected...
Broad-band X-ray spectra of the persistent black hole candidates LMC X-1 and LMC X-3 (2000)
Haardt, F., Galli, M. R., Treves, A., Chiappetti, L., Fiume, D. Dal, Corongiu, A., ...
We report on observations of the two persistent black hole candidates LMC X-3 and LMCX-1 performed with \BS in October 1997. The flux of LMC X-1 was possibly measured up to 60 keV, but there is a...
Broad band spectrum of Cygnus X-1 in two spectral states with BeppoSAX (2000)
Frontera, F., Palazzi, E., Zdziarski, A. A., Haardt, F., Perola, G. C., Chiappetti, L., ...
We report on the 0.5--200 keV spectral properties of Cyg X-1 observed at different epochs with the Narrow Field Instruments of the BeppoSAX satellite. The source was in its soft state during the...
Hard X-rays from Type II bursts of the Rapid Burster and its transition toward quiescence (2000)
Masetti, N., Frontera, F., Stella, L., Orlandini, M., Parmar, A. N., Del Sordo, S., ...
We report on 4 BeppoSAX Target Of Opportunity observations of MXB 1730-335, the Rapid Burster (RB), made during the 1998 February-March outburst. In the first observation, approximately 20 days after...
Vreeswijk, P. M., Fruchter, A., Kaper, L., Rol, E., Galama, T. J., Van Paradijs, J., ...
We present time-resolved optical spectroscopy of the afterglows of the gamma-ray bursts GRB 990510 and GRB 990712. Through the identification of several absorption lines in the first epoch GRB 990510...
Discovery of hard X-ray emission from Type II bursts of the Rapid Burster (2000)
Frontera, F., Masetti, N., Orlandini, M., Amati, L., Palazzi, E., Fiume, D. Dal, ...
We report on results of BeppoSAX Target Of Opportunity (TOO) observations of the source MXB 1730-335, also called the Rapid Burster (RB), made during its outburst of February-March 1998. We monitored...
X-ray afterglow detection of the short gamma-ray burst 991014 (2000)
Kuiper, L., Amati, L., Antonelli, L. A., Hurley, K., Coletta, A., ...
GRB 991014 is one of the shortest gamma-ray bursts detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. The duration is 9.6 sec in 2-28 keV and 3.2 sec in 40 to...
GRB990712: First Indication of Polarization Variability in a Gamma-ray Burst Afterglow (2000)
Rol, E., Vreeswijk, P. M., Kaper, L., Galama, T. J., Van Paradijs, J., ...
We report the detection of significant polarization in the optical afterglow of GRB990712 on three instances 0.44, 0.70 and 1.45 days after the gamma-ray burst, with (P, theta) being (2.9% +- 0.4%,...
ISO detection of a 60micron source near GRB970508 (2000)
Hanlon, L., Laureijs, R. J., Metcalfe, L., McBreen, B., Altieri, B., Castro-Tirado, A., ...
The Infrared Space Observatory observed the field of the $\gamma$--ray burst GRB 970508 with the CAM and PHT instruments on May 21 and 24, 1997 and with PHT in three filters in November 1997. A...
GRB990510: on the possibility of a beamed X-ray afterglow (2000)
Kuulkers, E., Antonelli, L. A., Kuiper, L., Kaastra, J. S., Amati, L., Costa, E., ...
We discuss the prompt emission of the gamma-ray burst (GRB) 990510 and its subsequent X-ray afterglow from 8.0 to 44.3 hrs after the prompt emission, using observations with the Gamma-ray Burst...
Prompt and afterglow emission from the X-ray rich GRB981226 observed with BeppoSAX (2000)
Frontera, F., Antonelli, L. A., Amati, L., Montanari, E., Costa, E., Fiume, D. Dal, ...
We discuss observations of the prompt X and gamma-ray emission and X-ray afterglow from GRB981226. This event has the weakest gamma-ray peak flux detected with the Gamma-Ray Burst Monitor. It shows...
ASCA and BeppoSAX observations of the peculiar X-ray source 4U1700+24/HD154791 (2000)
Fiume, D. Dal, Masetti, N., Bartolini, C., Del Sordo, S., Frontera, F., Guarnieri, A., ...
The X-ray source 4U1700+24/HD154791 is one of the few galactic sources whose counterpart is an evolved M star. In X-rays the source shows extreme erratic variability and a complex and variable...
BeppoSAX spectrum of GRB971214: evidence of a substantial energy output during afterglow (2000)
Fiume, D. Dal, Amati, L., Antonelli, L. A., Fiore, F., Muller, J. M., Parmar, A., ...
We report the X/gamma-ray spectrum of GRB971214 and of its afterglow. The afterglow was measured few hours after the main event and for an elapsed time of more than two days. The measure of this GRB...
X-ray/optical observations of XTE J0421+560/CI Cam in quiescence (2000)
Orlandini, M., Parmar, A. N., Frontera, F., Masetti, N., Fiume, D. Dal, Orr, A., ...
We report on a BeppoSAX observation of the transient X-ray source XTE J0421+560 during quiescence performed ~150 days after the 1998 April outburst. The source had an unabsorbed 0.5-10 keV flux of...
What can BeppoSAX tell us about short GRBs: An update from the Subsecond GRB Project (2000)
Gandolfi, G., Feroci, M., Costa, E., Piro, L., Smith, M. J. S., Muller, J. M., ...
We present some statistical considerations on the BeppoSAX hunt for subsecond GRBs at the Scientific Operation Center. Archive analysis of a BATSE/SAX sub-sample of bursts indicates that the GRB...
Near-infrared detection and optical follow-up of the GRB990705 afterglow (2000)
Masetti, N., Palazzi, E., Pian, E., Hunt, L.K., Mendez, M., Frontera, F., ...
GRB000528, optical observations at ESO (2000)
Palazzi, E., Masetti, N., Pian, E., Frontera, F., Castro-Tirado, A.J., Hjorth, J., ...
Hubble Space Telescope observations of the host galaxy of GRB 970508 (2000)
Fruchter, A.S., Pian, E., Gibbons, R., Thorsett, S.E., Ferguson, H., Petro, L., ...
Optical Follow-up of GRB000529 Error Box (2000)
Palazzi, E., Masetti, N., Pian, E., Frontera, F., Castro-Tirado, A.J., Hjorth, J., ...
Near-infrared detection and optical follow-up of the GRB 990705 afterglow (2000)
Masetti, N., Palazzi, E., Pian, E., Hunt, L.K., Mendez, R.M., Frontera, F., ...
Discovery of the optical counterpart and early optical observations of GRB 990712 (2000)
Sahu, K.C., Vreeswijk, P.M., Bakos, G., Menzies, J.W., Bragaglia, A., Frontera, F., ...
Vreeswijk, P.M., Fruchter, A., Kaper, L., Rol, E., Galama, T.J., Paradijs, J.A. Van, ...
We present time-resolved optical spectroscopy of the afterglows of the gamma-ray bursts GRB 990510 and GRB 990712. Through the identification of several absorption lines in the first-epoch GRB 990510...
ISO detection of a 60 mu m source near GRB 970508 (2000)
Hanlon, L., Laureijs, R.J., Metcalfe, L., McBreen, B., Altieri, B., Castro-Tirado, A.J., ...
Discovery of the Optical Counterpart and Early Optical Observations of GRB 990712 (2000)
Sahu, KC, Vreeswijk, P, Bakos, G, Menzies, JW, Bragaglia, A, Frontera, F, ...
BeppoSAX and Ulysses data on the giant flare from SGR 1900+14 (1999)
Feroci, M., Hurley, K., Duncan, R., Thompson, C., Costa, E., Frontera, F.
The extraordinary giant flare of 1998 August 27 from SGR 1900+14 was the most intense event ever detected from this or any other cosmic source (even more intense than the famous March 5th 1979...
A Robust Filter for the BeppoSAX Gamma Ray Burst Monitor Triggers (1999)
Feroci, M., Bianco, C. L., Lazzarotto, F., Mattei, A., Ventura, G., Costa, E., ...
The BeppoSAX Gamma Ray Burst Monitor (GRBM) is triggered any time a statistically significant counting excess is simultaneously revealed by at least two of its four independent detectors. Several...
Prompt and delayed emission properties of Gamma-Ray Bursts observed with BeppoSAX (1999)
Frontera, F., Amati, L., Costa, E., Muller, J. M., Pian, E., Piro, L., ...
We investigated the spectral evolution in the 2--700 keV energy band of Gamma-Ray Bursts (GRBs) detected by the Gamma-Ray Burst Monitor (GRBM) and localized with the Wide Field Cameras (WFCs) aboard...
Pian, E., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., Cusumano, G., ...
We present BeppoSAX follow-up observations of GRB980425 obtained with the Narrow Field Instruments (NFI) in April, May, and November 1998. The first NFI observation has detected within the 8' radius...
The Radio Afterglow and the Host Galaxy of the X-Ray Rich GRB 981226 (1999)
Frail, D. A., Kulkarni, S. R., Bloom, J. S., Djorgovski, S. G., Gorjian, V., Gal, R. R., ...
We report the discovery of a radio transient VLA 232937.2-235553, coincident with the proposed X-ray afterglow for the gamma-ray burst GRB 981226. This GRB has the highest ratio of X-ray to gamma-ray...
VLT observations of GRB 990510 and its environment (1999)
Beuermann, K., Hessman, F. V., Reinsch, K., Nicklas, H., Vreeswijk, P. M., Galama, T. J., ...
We present BVRI photometry and spectrophotometry of GRB990510 obtained with the ESO VLT/Antu telescope during the late decline phase. Between days 8 and 29 after the burst, the afterglow faded from...
The broad-band spectrum of OAO1657-415 with BeppoSAX: In search of cyclotron lines (1999)
Orlandini, M., Fiume, D. Dal, Del Sordo, S., Frontera, F., Parmar, A. N., Santangelo, A., ...
We report on a 30 ks observation of the high-mass X-ray binary pulsar OAO1657-415 performed by BeppoSAX on September 1998. The wide band spectrum is well fit by both a cutoff power law, or a power...
Integrating the BeppoSAX Gamma-Ray Burst Monitor into the 3rd Interplanetary Network (1999)
Hurley, K., Feroci, M., Costa, E., Preger, B., Frontera, F., ...
We have added the BeppoSAX Gamma-Ray Burst Monitor to the 3rd Interplanetary Network of burst detectors. We analyze 16 bursts whose positions are known to good accuracy from measurements at other...
Iron line signatures in X-ray afterglows of GRB by BeppoSAX (1999)
Piro, L., Costa, E., Feroci, M., Stratta, G., Frontera, F., Amati, L., ...
We report the possible detection (99.3% of statistical significance) of redshifted Fe iron line emission in the X-ray afterglow of Gamma-ray burst GRB970508 observed by BeppoSAX. Its energy is...
Vreeswijk, P. M., Galama, T. J., Rol, E., Van Paradijs, J., Kouveliotou, C., ...
Following a BeppoSAX alert (Piro 1999a) and the discovery of the OT at SAAO (Vreeswijk et al. 1999a), we observed GRB 990510 with the FORS instrument on ESO's VLT Unit 1 (`Antu'). The burst is...
Early detection of the optical counterpart to GRB 980329 (1999)
Gorosabel, J., Castro-Tirado, A. J., Pedrosa, A., Zapatero-Osorio, M. R., Fernades, A. J. L., Feroci, M., ...
We report optical observations of the GRB 980329 error box which represent the second earliest detection of the GRB 980329 optical transient. We determine R = 23.7 $\pm$ 0.5 mag on 29.89 March, which...
The broad band spectral properties of binary X-ray pulsars (1999)
Fiume, D. Dal, Orlandini, M., Del Sordo, S., Frontera, F., Oosterbroek, T., Palazzi, E., ...
The X-ray telescopes on board BeppoSAX are an optimal set of instruments to observe bright galactic binary pulsars. These sources emit very hard and quite complex X-ray spectra that can be accurately...
The X-ray, Optical and Infrared Counterpart to GRB 980703 (1999)
Vreeswijk, P. M., Galama, T. J., Owens, A., Oosterbroek, T., Geballe, T. R., Van Paradijs, J., ...
We report on X-ray, optical and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box; assuming a power law decline we find for its decay...
The X-ray afterglow of GRB980519 (1999)
Nicastro, L., Amati, L., Antonelli, L. A., Costa, E., Cusumano, G., Feroci, M., ...
Over a total of 20 gamma-ray bursts localized with arcmin accuracies, GRB980519 represents the 13th detected by the BeppoSAX Wide Field Cameras. An X-ray TOO observation performed by the BeppoSAX...
BeppoSAX observations of the black hole candidates LMC X-1 and LMC X-3 (1999)
Treves, A., Galli, M. R., Haardt, F., Belloni, T., Chiappetti, L., Fiume, D. Dal, ...
We describe BeppoSAX observations of the black hole candidates LMC X--1 and LMC X--3 performed in Oct. 1997. Both sources can be modelled by a multicolor accretion disk spectrum, with temperature...
Observation of contemporaneous optical radiation from a gamma-ray burst (1999)
Akerlof, C, Balsano, R, Barthelmy, S, Bloch, J, Butterworth, P, Casperson, D, ...
The origin of gamma-ray bursts (GRBs) has been enigmatic since their discovery(1). The situation improved dramatically in 1997, when the rapid availability of precise coordinates(2,3) for the bursts...
Observation of contemporaneous optical radiation from a gamma-ray burst (1999)
Akerlof, Carl W, Balsano, R, Barthelmy, S D, Bloch, J, Butterworth, P S, Caspers, Friedhelm, ...
The origin of gamma-ray bursts (GRBs) has been enigmatic since their discovery. The situation improved dramatically in 1997, when the rapid availability of precise coordinates for the bursts allowed...
Observation of contemporaneous optical radiation from a gamma-ray burst (1999)
Akerlof, C., Balsano, R., Barthelmy, S., Bloch, J., Butterworth, P., Casperson, D., ...
The origin of gamma-ray bursts (GRBs) has been enigmatic since their discovery. The situation improved dramatically in 1997, when the rapid availability of precise coordinates for the bursts allowed...
Observation of contemporaneous optical radiation from a gamma-ray burst (1999)
Akerlof, Carl W, Balsano, R, Barthelmy, S D, Bloch, J, Butterworth, P S, Caspers, Friedhelm, ...
The origin of gamma-ray bursts (GRBs) has been enigmatic since their discovery. The situation improved dramatically in 1997, when the rapid availability of precise coordinates for the bursts allowed...
HST Observations of the Host Galaxy of GRB970508 (1999)
Fruchter, A. S., Pian, E., Gibbons, R., Thorsett, S. E., Ferguson, H., Petro, L., ...
We report on observations of the field of GRB~970508 made in early August 1998, 454 days after outburst, with the STIS CCD camera onboard the Hubble Space Telescope. The images, taken in open filter...
BeppoSAX Detection and Follow-up of GRB980425 (1999)
Pian, E., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., Cusumano, G., ...
We present BeppoSAX GRBM and WFC light curves of GRB980425 and NFI follow-up data taken in 1998 April, May, and November. The first NFI observation has detected within the 8' radius error box of the...
The Host Galaxy of GRB 990123 (1999)
Bloom, J. S., Odewahn, S. C., Djorgovski, S. G., Koresko, C., Neugebauer, G., ...
We present deep images of the field of gamma-ray burst (GRB) 990123 obtained in a broad-band UV/visible bandpass with the Hubble Space Telescope, and deep near-infrared images obtained with the...
A Giant Outburst from SGR 1900+14 Observed with the BeppoSAX Gamma Ray Burst Monitor (1999)
Feroci, M., Frontera, F., Costa, E., Amati, L., Tavani, M., Rapisarda, M., ...
We report the detection by the Gamma Ray Burst Monitor onboard BeppoSAX of the strongest and longest ever detected outburst from SGR 1900+14. Oscillations are detectable with a period of ~5.16 s for...
Piro, L., Costa, E., Feroci, M., Frontera, F., Amati, L., Fiume, D. Dal, ...
We report the possible detection (99.3% of statistical significance) of redshifted Fe iron line emission in the X-ray afterglow of Gamma-ray burst GRB970508 observed by BeppoSAX. Its energy is...
BeppoSAX observations of Mkn 3: Piercing through the torus of a Seyfert 2 galaxy (1999)
Cappi, M., Bassani, L., Comastri, A., Guainazzi, M., Maccacaro, T., Malaguti, G., ...
A new BeppoSAX broad-band (0.6-150 keV) spectrum of the Seyfert 2 galaxy Mkn 3 is presented. The spectrum provides a direct measurement of a large, neutral column of gas with Nh~10**24 cm**-2 in the...
BeppoSAX uncovers the hidden Seyfert 1 nucleus in the Seyfert 2 galaxy NGC 2110 (1999)
Malaguti, G., Bassani, L., Cappi, M., Comastri, A., DiCocco, G., Fabian, A. C., ...
The Seyfert 2 galaxy NGC 2110 has been observed with BeppoSAX between 0.5 and 150 keV. The high energy instrument onboard, PDS, has succeeded in measuring for the first time the spectrum of this...
Infrared and optical observations of GRB990705 (1999)
Palazzi, E., Masetti, N., Pian, E., Frontera, F., Amati, L., Mendez, M., ...
BeppoSAX observations of the 1998 outburst of 4U 1630-47 (1999)
Oosterbroek, T., Parmar, A.N., Kuulkers, E., Belloni, T., Klis, M. Van Der, Frontera, F., ...
Detection of polarization in the afterglow of GRB 990510 with the ESO Very Large Telescope (1999)
Vreeswijk, P.M., Galama, T.J., Rol, E., Paradijs, J.A. Van, Kouveliotou, C., ...
Following a BeppoSAX alert and the discovery of the OT at SAAO, we observed GRB 990510 with the FORS instrument on ESO's VLT Unit 1 (Antu). The burst is unremarkable in gamma rays, but in optical is...
The x-ray, optical and infrared counterpart to GRB 980703 (1999)
Vreeswijk, P.M., Galama, T.J., Owens, A.N., Oosterbroek, T., Geballe, T.R., Paradijs, J.A. Van, ...
On the possible association of SN 1998bw and GRB 980425 (1999)
Galama, T.J., Vreeswijk, P.M., Paradijs, J.A. Van, Kouveliotou, C., Augusteijn, T., Patat, F., ...
We here discuss the possibility that the peculiar supernova SN 1998bw and the Gamma-Ray Burst GRB 980425 are associated. If the two are related, the energy radiated in gamma rays is at least four...
Broad-band spectral evolution of GRB afterglows (1999)
Masetti, N., Pian, E., Palazzi, E., Amati, L., Galama, T.J., Nicastro, L., ...
The x-ray, optical and infrared counterpart to GRB 980703 (1999)
Vreeswijk, P.M., Galama, T.J., Owens, A.N., Oosterbroek, T., Geballe, T.R., Paradijs, J.A. Van, ...
VLT observations of GRB 990510 and its environment (1999)
Beuermann, K., Hessman, F.V., Reinsch, K., Nicklas, H., Vreeswijk, P.M., Galama, T.J., ...
The fading optical counterpart of GRB 970228, 6 months and 1 year later (1999)
Fruchter, A.S., Pian, E., Thorsett, S.E., Bergeron, L.E., Gonzalez, R.A., Metzger, M.R., ...
Observations of GRBs with Infrared Space Observatory (1999)
Hanlon, L., Metcalfe, L., Delaney, M., Laureijs, R., McBreen, B., Smith, N., ...
The X-Ray, Optical, And Infrared Counterpart To GRB 980703 (1999)
P. M. Vreeswijk, T. J. Galama, A. Owens, T. Oosterbroek, T. R. Geballe, J. Van Paradijs, ...
We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box ; assuming a power-law decline, we nd for its decay...
BeppoSAX observations of an orbital cycle of the X-ray binary pulsar GX301-2 (1998)
Orlandini, M., Fiume, D. Dal, Frontera, F., Oosterbroek, T., Parmar, A. N., Santangelo, A., ...
We present preliminary results on our campaign of observations of the X-ray binary pulsar GX301-2. BeppoSAX observed this source six times in January/February 1998: at the periastron and apoastron,...
The optical/IR counterpart of the 3 July 1998 gamma-ray burst and its evolution (1998)
Castro-Tirado, A. J., Zapatero-Osorio, M. R., Gorosabel, J., Greiner, J., Heidt, J., Herranz, D., ...
We imaged the X-ray error box of GRB 980703, beginning 22.5 hours after the gamma--ray event, in both the optical R and near-infrared H bands. A fading optical/IR object was detected within the X-ray...
The extraordinary X-ray spectrum of XTE J0421+560 (1998)
Orr, A., Parmar, A. N., Orlandini, M., Frontera, F., Fiume, D. Dal, Segreto, A., ...
We report results of two BeppoSAX observations of the transient X-ray source XTE J0421+560 during the outburst that started in March 1998. The source exhibits radio jets and coincides with the binary...
The 1998 outburst of the X-ray transient 4U 1630-47 observed with BeppoSAX (1998)
Oosterbroek, T., Parmar, A. N., Kuulkers, E., Belloni, T., Frontera, F., ...
We report results of five pointed BeppoSAX observations of the black hole candidate 4U 1630-47 during part of its 1998 outburst when the 2-10 keV source luminosity decreased from 2.1x10^38 erg/s (for...
The absorption properties of gamma-ray burst afterglows measured by BeppoSAX (1998)
Owens, Alan, Guainazzi, M., Oosterbroek, T., Orr, A., Parmar, A. N., Costa, E., ...
We present an analysis of the X-ray absorption properties of 6 gamma-ray burst (GRB) afterglows measured with BeppoSAX. Between 8 hrs and 20 hrs after the initial GRB trigger, individual spectra can...
Bassani, L., Cappi, M., Malaguti, G., Palumbo, G. G. C., Dadina, M., Comastri, A., ...
We report broad band (0.1-200 keV) X-ray observations, made by BeppoSAX, of a sample of bright Seyfert 2 galaxies: NGC7172, NGC2110, NGC4507, Mkn 3 and NGC7674. These spectra provide a better...
Multifrequency observations of XTE J0421+560/CI Cam in outburst (1998)
Frontera, F., Orlandini, M., Amati, L., Fiume, D. Dal, Masetti, N., Orr, A., ...
We report on two X-ray observations of the transient source XTE J0421+560 performed by BeppoSAX, and on a series of observations performed by the 0.7m Teramo-Normale Telescope. Outburst peak...
An optical study of the GRB 970111 field beginning 19 hours after the Gamma-Ray Burst (1998)
Gorosabel, J., Castro-Tirado, A. J., Wolf, C., Heidt, J., Seitz, T., Thommes, E., ...
We present the results of the monitoring of the GRB 970111 field that started 19 hours after the event. This observation represents the fastest ground-based follow-up performed for GRB 970111 in all...
BeppoSAX observations of GRB970402 (1998)
Nicastro, L., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., Cusumano, G., ...
GRB970402 is the fourth gamma-ray burst detected by BeppoSAX simultaneously in the Gamma Ray Burst Monitor (GRBM) and one of the two Wide Field Cameras (WFCs). A rapid pointing of the BeppoSAX Narrow...
Gamma-Ray Burst 980329 and its X-Ray Afterglow (1998)
Amati, L., Antonelli, L. A., Butler, R. C., Castro-Tirado, A. J., Coletta, A., ...
GRB 980329 is the brightest gamma-ray burst detected so far with the Wide Field Cameras aboard BeppoSAX, both in gamma-rays and X-rays. With respect to its fluence (2.6 X 10**-5 erg/s/cm**2 in 50 to...
The Fading Optical Counterpart of GRB~970228, Six Months and One Year Later (1998)
Fruchter, A. S., Pian, E., Thorsett, S. E., Bergeron, L. E., Gonzalez, R. A., Metzger, M., ...
We report on observations of the fading optical counterpart of the gamma-ray burst GRB 970228, made with the Hubble Space Telescope STIS CCD approximately six months after outburst and with the...
The Host Galaxy of the Gamma--Ray Burst 971214 (1998)
Odewahn, S. C., Djorgovski, S. G., Kulkarni, S. R., Dickinson, M., Frail, D. A., Ramaprakash, A. N., ...
We report on Hubble Space Telescope (HST) observations of the host galaxy of GRB 971214, about four months after the burst. The redshift of the proposed host galaxy at z=3.418, combined with optical...
A `Hypernova' model for SN 1998bw associated with gamma-ray burst of 25 April 1998 (1998)
Iwamoto, K., Mazzali, P. A., Nomoto, K., Umeda, H., Nakamura, T., Patat, F., ...
The discovery of the peculiar supernova (SN) 1998bw and its possible association with the gamma-ray burst (GRB) 980425$^{1,2,3}$ provide new clues to the understanding of the explosion mechanism of...
Discovery of the peculiar supernova 1998bw in the error box of GRB980425 (1998)
Galama, T. J., Vreeswijk, P. M., Van Paradijs, J., Kouveliotou, C., Augusteijn, T., Hainaut, O. R., ...
The discovery of X-ray, optical and radio afterglows of gamma-ray bursts (GRBs) and the measurements of the distances to some of them have established that these events come from Gpc distances and...
The Discovery of the Radio Afterglow From the Optically Dim Gamma-Ray Burst of March 29, 1998 (1998)
Taylor, G. B., Frail, D. A., Kulkarni, S. R., Shepherd, D. S., Feroci, M., Frontera, F.
We report on the discovery of a variable radio source, VLA J070238.0+385044, associated with the proposed x-ray counterpart, 1SAX J0702.6+3850 of GRB 980329. The source was monitored from one day...
Detection of the near-infrared counterpart of GRB 971214 3.2 hours after the gamma-ray event (1998)
Gorosabel, J., Castro-Tirado, A. J., Willott, C. J., Hippelein, H., Greiner, J., Shlyapnikov, A., ...
We report the detection of the GRB 971214 counterpart in the near-infrared by means of two images in the K'-band taken at Calar Alto only ~3.5 and ~5 hours after the gamma-ray event. We detect the...
High resolution imaging of the X-ray afterglow of GRB970228 with ROSAT (1998)
Frontera, F., Greiner, J., Antonelli, L. A., Costa, E., Fiore, F., Parmar, A. N., ...
We report results of a ROSAT High-Resolution Imager (HRI) observation of the X-ray error box given by the BeppoSAX Wide Field Camera for the gamma-ray burst that occurred on 1997 February 28. The...
BeppoSAX observation of 4U1626-67: Discovery of an absorption cyclotron resonance feature (1998)
Orlandini, M., Fiume, D. Dal, Frontera, F., Del Sordo, S., Piraino, S., Santangelo, A., ...
We report on an observation of the low-mass X-ray binary 4U1626-67 performed during the BeppoSAX Science Verification Phase. An absorption feature at ~37 keV, attributable to electron cyclotron...
Israel, G. L., Campana, S., Cusumano, G., Frontera, F., Orlandini, M., Santangelo, A., ...
We analysed 13 archival ROSAT PSPC and HRI observations which included the position of a newly discovered 59s X-ray pulsar in the Small Magellanic Cloud, 1SAX J0054.9-7226 = 2E 0053.2-7242. The...
The broad band spectral properties of galactic X-ray binary pulsars (1998)
Fiume, D. Dal, Orlandini, M., Frontera, F., Del Sordo, S., Piraino, S., Santangelo, A., ...
BeppoSAX observed several galactic binary X-ray pulsars during the Science Verification Phase and in the first year of the regular program. The complex emission spectra of these sources are an ideal...
BeppoSAX follow-up search for the X-ray afterglow of GRB970111 (1998)
Feroci, M., Antonelli, L. A., Guainazzi, M., Muller, J. M., Costa, E., Piro, L., ...
The BeppoSAX satellite has recently opened a new way towards the solution of the long standing gamma-ray bursts' (GRBs) enigma, providing accurate coordinates few hours after the event thus allowing...
High Energy Properties of X-ray Sources observed with BeppoSAX (1998)
Frontera, F., Fiume, D. Dal, Malaguti, G., Nicastro, L., Orlandini, M., Palazzi, E., ...
We report on highlight results on celestial sources observed in the high energy band (>20 keV) with BeppoSAX. In particular we review the spectral properties of sources that belong to different...
HST/STIS Observations of the optical counterpart to GRB 970228 (1998)
Fruchter, A.S., Pian, E., Thorsett, S.E., Gonzales, R., Sahu, K.C., Mutchler, M., ...
A 'hypernova' model for the supernova associated with the gamma-ray burst of 25 April 1998 (1998)
Iwamoto, K., Mazzali, P., Nomoto, K., Umeda, H., Nakamura, T., Young, T.R., ...
An unusual supernova in the error box of the GRB of 25 April 1998 (1998)
Galama, T.J., Vreeswijk, P.M., Paradijs, J.A. Van, Kouveliotou, C., Augusteijn, T., Hainaut, O.R., ...
Optical and near-infrared follow-up observations of GRB 980329 (1998)
Palazzi, E., Pian, E., Masetti, N., Nicastro, L., Vreeswijk, P.M., Galama, T.J., ...
Millimetre detection of GRB 970508 (1998)
Bremer, M., Krichbaum, T.P., Galama, T.J., Castro-Tirado, A.J., Frontera, F., Paradijs, J.A. Van, ...
The 1998 outburst of the X-ray transient 4U 1630-47 observed with BeppoSAX (1998)
Oosterbroek, T., Parmar, A.N., Kuulkers, E., Belloni, T., Klis, M. Van Der, Frontera, F., ...
The rapid decay of the optical emission from GRB 980326 and its possible implications (1998)
Groot, P.J., Galama, T.J., Vreeswijk, P.M., Pian, E., Palazzi, E., ...
Broad band X-ray spectral properties of Gamma-ray bursts with BeppoSAX (1997)
Frontera, F., Amati, L., Costa, E., Feroci, M., Muller, J. M., Pizzichini, G., ...
In about one year, five gamma-ray bursts were simultaneously observed with the Wide Field Cameras and Gamma Ray Burst Monitor aboard the BeppoSAX satellite. From some of them X-ray afterglow emission...
BeppoSAX observations of PKS 0528+134 (1997)
Ghisellini, G., Tagliaferri, G., Costamante, L., Maraschi, L., Celotti, A., Fossati, G., ...
We report on the BeppoSAX observations of the gamma-ray blazar PKS 0528+134 performed in Feb and Mar 1997, during a multiwavelength campaign involving EGRET and ground based telescopes. The source...
Hubble Space Telescope Imaging of the Field of GRB970508 (1997)
Pian, E., Fruchter, A., Bergeron, L. E., Thorsett, S. E., Frontera, F., Tavani, M., ...
We report on Hubble Space Telescope observations of the optical transient discovered in the error box of GRB970508. The object was imaged on 1997 June 2 with the Space Telescope Imaging Spectrograph...
BeppoSAX observations of the X-ray binary pulsar 4U1626-67 (1997)
Orlandini, M., Fiume, D. Dal, Frontera, F., Del Sordo, S., Piraino, S., Santangelo, A., ...
We report on observations of the low-mass X-ray binary 4U1626-67 performed during the BeppoSAX Science Verification Phase. We present the broad-band 0.1-100 keV pulse averaged spectrum, that is well...
The broad-band (0.1-200 keV) spectrum of Her X-1 observed with BeppoSAX (1997)
Fiume, D. Dal, Orlandini, M., Cusumano, G., Del Sordo, S., Feroci, M., Frontera, F., ...
The X-ray pulsar Her X-1 was observed for more than two orbital cycles near the maximum of the 35 day X-ray intensity cycle by the Narrow Field Instruments on-board the BeppoSAX satellite. We present...
The pulsed light curves of Her X-1 as observed by BeppoSAX (1997)
Fiume, D. Dal, Orlandini, M., Cusumano, G., Del Sordo, S., Feroci, M., Frontera, F., ...
We report on the timing analysis of the observation of the X-ray binary pulsar Her X-1 performed during the BeppoSAX Science Verification Phase. The observation covered more that two full orbital...
Frontera, F., Costa, E., Piro, L., Muller, J. M., Amati, L., Feroci, M., ...
We report high-energy spectral data of the prompt emission of GRB970228 and its X-ray afterglow. We establish that the nature of the X-ray afterglow emission is non-thermal and similar to the later...
The Vela X-1 pulse-averaged spectrum as observed by BeppoSAX (1997)
Orlandini, M., Fiume, D. Dal, Frontera, F., Cusumano, G., Del Sordo, S., Giarrusso, S., ...
We report on the 20 ksec observation of Vela X-1 performed by BeppoSAX on 1996 July 14 during its Science Verification Phase. We observed the source in two intensity states, characterized by a change...
BeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy (1997)
Malaguti, G., Palumbo, G. G. C., Cappi, M., Comastri, A., Otani, C., Matsuoka, M., ...
The Seyfert 2 galaxy NGC 7674 has been observed within the BeppoSAX Core Programme with the onboard narrow field instruments between 0.1 and 100 keV. The broad-band spectrum shows four most relevant...
Evidence for a late-time outburst of the X-ray afterglow of GB970508 from BeppoSAX (1997)
Piro, L., Amati, L., Antonelli, L. A., Butler, R. C., Costa, E., Cusumano, G., ...
The gamma-ray burst GB970508 was observed simultaneously by the Gamma Ray Burst Monitor (GRBM) and one of the X-ray Wide Field Cameras (WFC) aboard BeppoSAX. The latter provided a position within...
Evidence for Diverse Optical Emission from Gamma-Ray Burst Sources (1997)
Pedersen, H., Jaunsen, A. O., Grav, T., Ostensen, R., Andersen, M. I., Wold, M., ...
Optical Transients from gamma-ray burst sources, in addition to offering a distance determination, convey important information on the physics of the emission mechanism, and perhaps also about the...
The Optical Transient of GRB970228, 16 hours after the burst (1997)
Pedichini, F., Di Paola, A., Stella, L., Buonanno, R., Boattini, A., Gandolfi, G., ...
Until recently the positions of gamma ray bursts were not sufficiently well known within a short timescale to localize and identify them with known celestial sources. Following the historical...
BeppoSAX/PDS Observation of Vela X-1 (1997)
Orlandini, M., Fiume, D. Dal, Nicastro, L., Palazzi, E., Frontera, F.
Vela X-1 has been observed by the Italian/Dutch X-ray satellite BeppoSAX during its Science Verification Phase. During the ~ 50 ksec observation (orbital phases 0.27-0.34) two different intensity...
In-flight performances of the BeppoSAX Gamma-Ray Burst Monitor (1997)
Feroci, M., Frontera, F., Costa, E., Fiume, D. Dal, Amati, L., Bruca, L., ...
The Italian-Dutch satellite for X-ray Astronomy BeppoSAX is successfully operating on a 600 km equatorial orbit since May 1996. We present here the in-flight performances of the Gamma Ray Burst...
The first X-ray localization of a gamma-ray burst by BeppoSAX and its fast spectral evolution (1997)
Piro, L., Heise, J., Jager, R., Costa, E., Frontera, F., Feroci, M., ...
In this paper we present the observations performed by the BeppoSAX Gamma-Ray Burst Monitor (GRBM) and Wide Field Cameras (WFC) of GB960720. We derive a precise localization (3 arcmin radius) and...
Early detection of the Optical Transient following the Gamma-Ray Burst GRB 970228 (1997)
Guarnieri, A., Bartolini, C., Masetti, N., Piccioni, A., Costa, E., Feroci, M., ...
The optical counterpart of the Gamma-Ray Burst GRB 970228, discovered by Groot et al. (IAU Circ. 6584), is also detected in the B and R frames obtained about 4 hours earlier at the Bologna...
Initial Results from the High Energy Experiment PDS aboard BeppoSAX (1997)
Frontera, F., Fiume, D. Dal, Costa, E., Feroci, M., Orlandini, M., Nicastro, L., ...
The high energy experiment PDS is one of the Narrow Field Instruments aboard the X-ray astronomy satellite BeppoSAX. It covers the energy band from 15 to 300 keV. Here we report results on its...
Grandi, P., Guainazzi, M., Mineo, T., Parmar, A. N., Fiore, F., Matteuzzi, A., ...
We report the results of a 3C273 observation performed during the Science Verification Phase (SVP) of the BeppoSax satellite. The broad-band spectrum is well represented by a power-law between 1 keV...
Hard X--ray detection of NGC 1068 with BeppoSAX (1997)
Matt, G., Guainazzi, M., Frontera, F., Bassani, L., Brandt, W. N., Fabian, A. C., ...
We report on the first detection above ~10 keV of the archetypal Compton-thick Seyfert 2 galaxy NGC 1068. This detection, obtained with the PDS instrument onboard BeppoSAX in the 20-100 keV range,...
Discovery of the X-Ray Afterglow of the Gamma-Ray Burst of February 28 1997 (1997)
Costa, E., Frontera, F., Heise, J., Feroci, M., Zand, J. In 't, Fiore, F., ...
Here we report the discovery in the X-ray band of the first afterglow of a gamma-ray burst. It was detected and quickly positioned by the Beppo-SAX satellite on 1997 February 28 (GRB970228). The...
Hurley, K., Costa, E., Feroci, M., Frontera, F., Cline, T., Fiume, D. Dal, ...
The gamma-ray burst of 1997 February 28 was localized using the arrival-time analysis method with the Ulysses, BeppoSAX, and WIND spacecraft. The result is a plus-or-minus 31.5 arcsec (3 sigma) wide...
Radio Monitoring of the January 11, 1997 Gamma-Ray Burst (1997)
Frail, D. A., Kulkarni, S. R., Costa, E., Frontera, F., Heise, J., Feroci, M., ...
We report on a comprehensive radio monitoring program of the bright gamma-ray burster GRB970111. These VLA observations were made at a frequency of 1.4 GHz and span a range of post-burst timescales...
First Results from the MECS on board BeppoSAX (1997)
Molendi, S., Chiappetti, L., Cusumano, G., Fiume, D. Dal, Fiore, F., Frontera, F., ...
In this contribution we discuss briefly a few calibration items relevant to the data analysis and present some preliminary scientific results. The discussion on instrumental topics focuses on the...
Linearity discontinuities in Xe-filled X-ray microstrip detectors (1997)
Zavattini, G, Frontera, F, Gambaccini, M, Pareschi, G, Feroci, M, Budtz-Jorgensen, C, ...