GRB 090423 at a redshift of z ≈ 8.1 (2009)
Salvaterra, Ruben, Della Valle, M., Campana, S., Chincarini, G., Covino, S., D'Avanzo, P., ...
3 pages, 2 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0906.1578
GRB081028 and its late-time afterglow re-brightening (2009)
Margutti, R., Genet, F., Granot, J., Duran, R. Barniol, Guidorzi, C., Chincarini, G., ...
Swift captured for the first time a smoothly rising X-ray re-brightening of clear non-flaring origin after the steep decay in a long gamma-ray burst (GRB): GRB081028. A rising phase is likely present...
Rykoff, E. S., Aharonian, F., Akerlof, C. W., Ashley, M. C. B., Barthelmy, S. D., Flewelling, H. A., ...
We report on a complete set of early optical afterglows of gamma-ray bursts (GRBs) obtained with the Robotic Optical Transient Search Experiment (ROTSE-III) telescope network from 2005 March through...
GRB090111: extra soft steep decay emission and peculiar re-brightening (2009)
Margutti, R., Sakamoto, T., Chincarini, G., Guidorzi, C., Mao, J., Pasotti, F., ...
We present a detailed study of GRB090111, focusing on its extra soft power-law photon index Gamma>5 at the very steep decay phase emission (power-law index alpha=5.1, steeper than 96% of GRBs...
Discovery of a Relativistic Supernova Without a Gamma-ray Trigger (2009)
Soderberg, A. M., Chakraborti, S., Pignata, G., Chevalier, R. A., Chandra, P., Ray, A., ...
Type Ibc supernovae (SNe Ibc) mark the gravitational collapse of some massive stars (M > 20 Msun) propelling several solar masses of material to typical velocities of ~10,000 km/s. The...
The High-Metallicity Explosion Environment of the Relativistic Supernova 2009bb (2009)
Levesque, E. M., Soderberg, A. M., Foley, R. J., Berger, E., Kewley, L. J., Chakraborti, S., ...
We investigate the environment of the nearby (d ~ 40Mpc) broad-lined Type Ic supernova SN 2009bb. This event was observed to produce a relativistic outflow likely powered by a central accreting...
Ukwatta, T. N., Stamatikos, M., Dhuga, K. S., Sakamoto, T., Barthelmy, S. D., Gehrels, N., ...
Spectral lag, the time difference between the arrival of high-energy and low-energy photons, is a common feature in Gamma-ray Bursts (GRBs). Norris et al. 2000 reported a correlation between the...
Testing the Epeak - Eiso relation for GRBs detected by Swift and Suzaku-WAM (2009)
Krimm, H. A., Yamaoka, K., Sugita, S., Ohno, M., Sakamoto, T., Barthelmy, S. D., ...
One of the most prominent, yet controversial associations derived from the ensemble of prompt-phase observations of gamma-ray bursts (GRBs) is the apparent correlation in the source frame between the...
Variability in the Prompt Emission of Swift-BAT Gamma-Ray Bursts (2009)
Ukwatta, T. N., Dhuga, K. S., Parke, W. C., Sakamoto, T., Markwardt, C. B., Barthelmy, S. D., ...
We present the results of our study of the variability time scales of a sample of 27 long Swift Gamma-Ray Bursts (GRBs) with known redshifts. The variability time scale can help our understanding of...
GRB 090423 reveals an exploding star at the epoch of re-ionization (2009)
Salvaterra, R., Della Valle, M., Campana, S., Chincarini, G., Covino, S., D'Avanzo, P., ...
The observation of the very early stages of the Universe represents one of the main challenges of modern cosmology. 200-300 million years after the Big Bang stars began to form, thus providing the...
Looking Into the Fireball: ROTSE-III and Swift Observations of Early GRB Afterglows (2009)
Rykoff, E. S., Aharonian, F., Akerlof, C. W., Ashley, M. C. B., Barthelmy, S. D., Flewelling, H. A., ...
We report on a complete set of early optical afterglows of gamma-ray bursts (GRBs) obtained with the ROTSE-III telescope network from March 2005 through June 2007. This set is comprised of 12...
In Situ Probes of the First Galaxies and Reionization: Gamma-ray Bursts (2009)
McQuinn, Matthew, Bloom, Joshua S., Grindlay, Jonathan, Band, David, Barthelmy, S. D., Berger, E., ...
The first structures in the Universe formed at z>7, at higher redshift than all currently known galaxies. Since GRBs are brighter than other cosmological sources at high redshift and exhibit simple...
Ukwatta, T. N., Sakamoto, T., Dhuga, K. S., Parke, W. C., Barthelmy, S. D., Gehrels, N., ...
Being able to quickly select among gamma-ray bursts (GRBs) seen by the Swift satellite those which are high-z candidates would give ground-based observers a better chance to determine a redshift for...
GRB 080913 at redshift 6.7 (2009)
Greiner, J., Krühler, T., Fynbo, J. P. U., Rossi, A., Schwarz, R., Klose, S., ...
Epeak estimator for Gamma-Ray Bursts Observed by the Swift Burst Alert Telescope (2008)
Sakamoto, T., Sato, G., Barbier, L., Barthelmy, S. D., Cummings, J. R., Fenimore, E. E., ...
We report a correlation based on a spectral simulation study of the prompt emission spectra of gamma-ray bursts (GRBs) detected by the Swift Burst Alert Telescope (BAT). The correlation is between...
Prompt optical observations of GRB 080330 and GRB 080413A (2008)
Yuan, F., Rykoff, E. S., Schaefer, B. E., Rujopakarn, W., Güver, T., Aharonian, F., ...
We report on the results of rapid responses to GRB 080330 and GRB 080413A by the ROTSE-IIIb and ROTSE-IIIc telecopes. In both cases, optical follow-up started during the prompt emission phase and...
The 2008 May burst activation of SGR 1627-41 (2008)
Esposito, P., Israel, G. L., Zane, S., Senziani, F., Starling, R. L. C., Rea, N., ...
In May 2008 the soft gamma-ray repeater SGR 1627-41 resumed its bursting activity after nearly a decade of quiescence. After detection of a bright burst, Swift pointed its X-ray telescope in the...
The Swift BAT X-Ray survey. III. X-Ray spectra and statistical properties (2008)
Ajello, M., Rau, A., Greiner, J., Kanbach, G., Salvato, M., Strong, A. W., ...
In this concluding part of the series of three papers dedicated to the Swift BAT hard X-ray survey (BXS), we focus on the X-ray spectral analysis and statistical properties of the source sample....
The Swift BAT X-ray survey - III. X-ray spectra and statistical properties (2008)
Ajello, M., Rau, A., Greiner, J., Kanbach, G., Salvato, M., Strong, A. W., ...
The 2008 May burst activation of SGR 1627–41 (2008)
Esposito, P., Israel, G.L., Zane, S., Senziani, F., Starling, R.L.C., Rea, N., ...
In 2008 May, the soft gamma-ray repeater (SGR) SGR 1627-41 resumed its bursting activity after nearly a decade of quiescence. After detection of a bright burst, Swift pointed its X-ray telescope in...
Correlations of prompt and afterglow emission in Swift long and short gamma-ray bursts (2008)
Gehrels, N., Barthelmy, S.D., Burrows, D.N., Cannizzo, J.K., Chincarini, G., Fenimore, E., ...
Correlation studies of prompt and afterglow emission from gamma-ray bursts (GRBs) between different spectral bands have been difficult to do in the past because few bursts had comprehensive and...
An extremely luminous X-ray outburst at the birth of a supernova (2008)
Soderberg, A.M., Berger, E., Page, K.L., Schady, P., Parrent, J., Pooley, D., ...
Massive stars end their short lives in spectacular explosions—supernovae—that synthesize new elements and drive galaxy evolution. Historically, supernovae were discovered mainly through their...
GRB 060714: No Clear Dividing Line Between Prompt Emission and X-ray Flares (2007)
Krimm, H. A., Granot, J., Marshal, F., Perri, M., Barthelmy, S. D., Burrows, D. N., ...
The long gamma-ray burst GRB 060714 was observed to exhibit a series of five X-ray flares beginning ~70 s after the burst trigger T0 and continuing until T0 + ~200 s. The first two flares were...
Swift Discovery of Gamma-Ray Bursts without Jet Break Feature in their X-Ray Afterglows (2006)
Sato, G., Yamazaki, R., Ioka, K., Sakamoto, T., Takahashi, T., Nakazawa, K., ...
We analyze Swift gamma-ray bursts (GRBs) and X-ray afterglows for three GRBs with spectroscopic redshift determinations -- GRB 050401, XRF 050416a, and GRB 050525a. We find that the relation between...
Gehrels, N., Norris, J. P., Mangano, V., Barthelmy, S. D., Burrows, D. N., Granot, J., ...
Gamma ray bursts (GRBs) are known to come in two duration classes, separated at ~2 s. Long bursts originate from star forming regions in galaxies, have accompanying supernovae (SNe) when near enough...
The Anomalous Early Afterglow of GRB 050801 (2006)
Rykoff, E.S., Aharonian, F., Akerlof, C. W., Mangano, V., Ashley, M. C. B., Güver, T., ...
The ROTSE-IIIc telescope at the HESS site, Namibia, obtained the earliest detection of optical emission from a gamma-ray burst (GRB), beginning only 21.8 s from the onset of Swift GRB 050801. The...
Swift and XMM observations of the dark GRB 050326 (2005)
Moretti, A., De Luca, A., Malesani, D., Campana, S., Tiengo, A., Cucchiara, A., ...
We present Swift and XMM observations of GRB 050326, detected by Swift-BAT. The fluence was 7.7x10^-6 erg cm^-2 (20-150 keV), and its spectrum was hard, with a power law photon index 1.25. The...
An origin for short g-ray bursts unassociated with current star formation (2005)
Barthelmy, S. D., Chincarini, G., Burrows, D. N., Gehrels, N., Covino, S., Moretti, A., ...
Two short (
Swift observations of the X-ray bright GRB 050315 (2005)
Vaughan, S., Goad, M. R., Beardmore, A. P., O'Brien, P. T., Osborne, J. P., Page, K. L., ...
This paper discusses Swift observations of the gamma-ray burst GRB 050315 (z=1.949) from 80 s to 10 days after the onset of the burst. The X-ray light curve displayed a steep early decay (t^-5) for...
A short gamma-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225 (2005)
Sarazin, C L, O'Brien, P T, Zhang, B, Barthelmy, S D, ...
Gamma-ray bursts (GRBs) come in two classes: long (> 2 s), soft-spectrum bursts and short, hard events. Most progress has been made on understanding the long GRBs, which are typically observed at...
Nysewander, M. C., Reichart, D. E., Williams, G. G., Kinugasa, K., Lamb, D. Q., ...
We present Follow-Up Network for Gamma-Ray Bursts (FUN GRB) Collaboration observations of the optical afterglow of GRB 021211 made between 143 seconds and 102 days after the burst. Our unique data...
Erratum: The Swift Gamma-Ray Burst Mission (2005)
Gehrels, N., Chincarini, G., Giommi, P., Mason, K. O., Nousek, J. A., Wells, A. A., ...
Prompt Optical Detection of GRB 050401 with ROTSE-IIIa (2005)
Rykoff, E.S., Aharonian, F., Akerlof, C. W., Alatalo, K., Ashley, M. C. B., Güver, T., ...
The ROTSE-IIIa telescope at Siding Spring Observatory, Australia, detected prompt optical emission from Swift GRB 050401. We present observations of the early optical afterglow, first detected by the...
The Swift Gamma-Ray Burst Mission (2004)
Gehrels, N., Chincarini, G, Giommi, P., Mason, K. O., Nousek, J. A., Wells, A. A., ...
The Swift mission, scheduled for launch in early 2004, is a multiwavelength observatory for gamma-ray burst (GRB) astronomy. It is the first-of-its-kind autonomous rapid-slewing satellite for...