A big γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
4 pages, 3 figures.-- ArXiv pre-print available at: http://arxiv.org/abs/0906.1577
A γ-ray burst at a redshift of z ≈ 8.2 (2009)
Tanvir, N. R., Fox , D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using...
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...
A new type of stellar explosion (2009)
Perets, H. B., Gal-Yam, A., Mazzali, P., Arnett, D., Kagan, D., Filippenko, A. V., ...
The explosive deaths of stars (supernovae; SNe) are generally explained by two physical processes. Young massive stars (more than eight solar masses, M_Sun) undergo gravitational core-collapse and...
A glimpse of the end of the dark ages: the gamma-ray burst of 23 April 2009 at redshift 8.3 (2009)
Tanvir, N. R., Fox, D. B., Levan, A. J., Berger, E., Wiersema, K., Fynbo, J. P. U., ...
It is thought that the first generations of massive stars in the Universe were an important, and quite possibly dominant, source of the ultra-violet radiation that reionized the hydrogen gas in the...
The Collimation and Energetics of the Brightest Swift Gamma-Ray Bursts (2009)
Cenko, S. B., Frail, D. A., Harrison, F. A., Kulkarni, S. R., Nakar, E., Chandra, P., ...
Long-duration gamma-ray bursts (GRBs) are widely believed to be highly-collimated explosions (opening angle theta ~ 1-10 deg). As a result of this beaming factor, the true energy release from a GRB...
Perley, D. A., Cenko, S. B., Bloom, J. S., Butler, N. R., Kocevski, D., ...
In this work we present the first results of our imaging campaign at Keck Observatory to identify the host galaxies of "dark" gamma-ray bursts (GRBs), events with no detected optical afterglow or...
Type Ia supernova science 2010-2020 (2009)
Howell, D. A., Conley, A., Della Valle, M., Nugent, P. E., Perlmutter, S., Marion, G. H., ...
In the next decade Type Ia supernovae (SNe Ia) will be used to test theories predicting changes in the Dark Energy equation of state with time. Ultimately this requires a dedicated space mission like...
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...
Berger, E., Soderberg, A. M., Chevalier, R. A., Fransson, C., Foley, R. J., Leonard, D. C., ...
[abridged] We present multi-epoch high-resolution optical spectroscopy, UV/radio/X-ray imaging, and archival Hubble and Spitzer observations of an intermediate luminosity optical transient recently...
VLBI Observations of SN 2008D (2008)
Bietenholz, M. F., Soderberg, A. M., Bartel, N.
We report on two epochs of very-long-baseline interferometry (VLBI) observations of the Type Ib/c supernova SN 2008D, which was associated with the X-ray outburst XRF 080109. At our first epoch, at t...
Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets (2008)
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...
New imaging and spectroscopy of the locations of several short-hard gamma-ray bursts (2008)
Gal-Yam, Avishay, Nakar, Ehud, Ofek, Eran O., Cenko, S. B., Kulkarni, S. R., Soderberg, A. M., ...
The detection and characterization of the afterglow emission and host galaxies of short-hard gamma-ray bursts (SHBs) is one of the most exciting recent astronomical discoveries. In particular,...
GRB 070610: a curious galactic transient (2008)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
GRB 070610 is a typical high-energy event with a duration of 5 s. Yet within the burst localization we detect a highly unusual X-ray and optical transient, Swift J195509.6+261406. We see...
Improved Cosmological Constraints from New, Old and Combined Supernova Datasets (2008)
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...
We present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compilations. This...
Immler, S., Modjaz, M., Landsman, W., Bufano, F., Brown, P. J., Milne, P., ...
The peculiar Type Ib supernova (SN) 2006jc has been observed with the UV/Optical Telescope (UVOT) and X-Ray Telescope (XRT) on board the Swift observatory over a period of 19-183 days after the...
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. Throughout history supernovae were discovered chiefly through their...
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., ...
GRB 070610: a curious galactic transient (2008)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
Improved cosmological constraints from new, old, and combined supernova data sets (2008)
Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...
We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...
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...
Immler, S., Modjaz, M., Landsman, W., Bufano, F., Brown, P. J., Milne, P., ...
The peculiar Type Ib supernova (SN) 2006jc has been observed with the UV/Optical Telescope (UVOT) and X-Ray Telescope (XRT) on board the Swift observatory over a period of 19 to 183 days after the...
GRB070125: The First Long-Duration Gamma-Ray Burst in a Halo Environment (2007)
Cenko, S. B., Fox, D. B., Penprase, B. E., Cucchiara, A., Price, P. A., Berger, E., ...
We present the discovery and high signal-to-noise spectroscopic observations of the optical afterglow of the long-duration gamma-ray burst GRB070125. Unlike all previously observed long-duration...
Berger, E., Chary, R., Cowie, L. L., Price, P. A., Schmidt, B. P., Fox, D. B., ...
We present deep Hubble Space Telescope (HST ) and Spitzer Space Telescope observations of GRB 050904 at z = 6:295. We detect the afterglow in the H band more than 3 weeks after the burst and confirm...
GRB070610 : A Curious Galactic Transient (2007)
Kasliwal, M. M., Cenko, S. B., Kulkarni, S. R., Cameron, P. B., Nakar, E., Ofek, E. O., ...
GRB 070610 is a typical high-energy event with a duration of 5s.Yet within the burst localization we detect a highly unusual X-ray and optical transient, SwiftJ195509.6+261406. We see high amplitude...
A New Population of High-Redshift Short-Duration Gamma-Ray Bursts (2007)
Berger, E., Fox, D. B., Price, P. A., Nakar, E., Gal-Yam, A., Holz, D. E., ...
The redshift distribution of the short-duration gamma-ray bursts (GRBs) is a crucial, but currently fragmentary, clue to the nature of their progenitors. Here we present optical observations of nine...
An unusually brilliant transient in the galaxy Messier 85 (2007)
Kulkarni, S. R., Ofek, E. O., Rau, A., Cenko, S. B., Soderberg, A. M., Fox, D. B., ...
Historically, variable and transient sources have both surprised astronomers and provided new views of the heavens. Here we report the discovery of an optical transient in the outskirts of the...
Immler, S., Brown, P. J., Milne, P., Dessart, L., Mazzali, P. A., Landsman, W., ...
We present results on the X-ray and optical/UV emission from the type IIP SN 2006bp and the interaction of the SN shock with its environment, obtained with the X-Ray Telescope (XRT) and UV/Optical...
On the progenitor of SN 2005gl and the nature of Type IIn supernovae (2007)
Gal-Yam, Avishay, Leonard, D. C., Fox, D. B., Cenko, S. B., Soderberg, A. M., ...
We present a study of the type IIn supernova (SN) 2005gl, in the relatively nearby (d~66 Mpc) galaxy NGC 266. Photometry and spectroscopy of the SN indicate it is a typical member of its class....
Ofek, E. O., Cenko, S. B., Gal-Yam, A., Fox, D. B., Nakar, E., Rau, A., ...
On 2006 May 5, a four second duration, low energy, ~10^49 erg, Gamma-Ray Burst (GRB) was observed, spatially associated with a z=0.0894 galaxy. Here, we report the discovery of the GRB optical...
On the Progenitor of SN 2005gl and the Nature of Type IIn Supernovae (2007)
Gal-Yam, Avishay, Leonard, D. C., Fox, D. B., Cenko, S. B., Soderberg, A. M., ...
We present a study of the Type IIn supernova (SN) 2005gl, in the relatively nearby (d ≈ 66 Mpc) galaxy NGC 266. Photometry and spectroscopy of the SN indicate that it is a typical member of its...
SN 2006gy: An extremely luminous supernova in the galaxy NGC 1260 (2006)
Ofek, E. O., Cameron, P. B., Kasliwal, M. M., Gal-Yam, A., Rau, A., Kulkarni, S. R., ...
With an extinction-corrected V-band peak absolute magnitude of about -22, supernova (SN) 2006gy is probably the brightest SN ever observed. We report on multi-wavelength observations of this SN and...
Preliminary Results from the Caltech Core-Collapse Project (CCCP) (2006)
Gal-Yam, Avishay, Cenko, S. B., Fox, D. B., Leonard, D. C., Sand, D. J., ...
We present preliminary results from the Caltech Core-Collapse Project (CCCP), a large observational program focused on the study of core-collapse SNe. Uniform, high-quality NIR and optical photometry...
The Incidence of Dwarf Novae in Large Area Transient Searches (2006)
Rau, A., Schwarz, R., Kulkarni, S. R., Ofek, E. O., Kasliwal, M. M., Brinkworth, C., ...
Understanding and quantifying the contribution of known classes of transient and variable sources is an important lesson to be learned from the manifold of pre-cursors programs of the near-future...
The Short-Hard GRB 051103: Observations and Implications for Its Nature (2006)
Ofek, E. O., Kulkarni, S. R., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., ...
The bright short-hard GRB 051103 was triangulated by the Inter-Planetary Network and found to occur in the direction of the nearby M81/M82 galaxy group. Given its possible local-universe nature, we...
Cenko, S. B., Kasliwal, M., Harrison, F. A., Pal'shin, V., Frail, D. A., Cameron, P. B., ...
We present observations of the unusually bright and long γ-ray burst GRB 050820A, one of the best sampled broadband data sets in the Swift era. The γ-ray light curve is marked by a soft precursor...
A New Population of High Redshift Short-Duration Gamma-Ray Bursts (2006)
Berger, E., Fox, D. B., Price, P. A., Nakar, E., Gal-Yam, A., Holz, D. E., ...
The redshift distribution of the short-duration GRBs is a crucial, but currently fragmentary, clue to the nature of their progenitors. Here we present optical observations of nine short GRBs obtained...
The short-hard GRB 051103: Observations and implications for its nature (2006)
Ofek, E. O., Kulkarni, S. R., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., ...
The bright short-hard GRB 051103 was triangulated by the inter-planetary network and found to occur in the direction of the nearby M81/M82 galaxy group. Given its possible local-Universe nature, we...
Cenko, S. B., Kasliwal, M., Harrison, F. A., Pal'shin, V., Frail, D. A., Cameron, P. B., ...
We present observations of the unusually bright and long gamma-ray burst GRB 050820A, one of the best-sampled broadband data sets in the Swift era. The gamma-ray light curve is marked by a soft...
On the progenitor of SN 2005gl and the nature of Type IIn supernovae (2006)
Gal-Yam, Avishay, Leonard, D. C., Fox, D. B., Cenko, S. B., Soderberg, A. M., ...
We present a study of the type IIn supernova (SN) 2005gl, in the relatively nearby (d~66 Mpc) galaxy NGC 266. Photometry and spectroscopy of the SN indicate it is a typical member of its class....
An Energetic Afterglow from a Distant Stellar Explosion (2006)
Frail, D. A., Cameron, P. B., Kasliwal, M., Nakar, E., Price, P. A., Berger, E., ...
We present the discovery of radio afterglow emission from the high-redshift (z = 6.295) burst GRB 050904. The peak flux density for this burst is similar to typical low-redshift gamma-ray bursts...
Soderberg, A. M., Nakar, E., Cenko, S. B., Cameron, P. B., Frail, D. A., Kulkarni, S. R., ...
We present detailed optical, near-infrared, and radio observations of the X-ray flash 050416a obtained with Palomar and Siding Springs Observatories as well as HST and the VLA, placing this event...
An Energetic Afterglow From A Distant Stellar Explosion (2006)
Frail, D. A., Cameron, P. B., Kasliwal, M., Nakar, E., Price, P. A., Berger, E., ...
We present the discovery of radio afterglow emission from the high redshift (z=6.295) burst GRB 050904. The peak flux density for this burst is similar to typical low-redshift gamma-ray bursts (GRB)....
Relativistic ejecta from XRF 060218 and the rate of cosmic explosions (2006)
Soderberg, A. M., Kulkarni, S. R., Nakar, E., Berger, E., Fox, D. B., Frail, D. A., ...
Over the last decade, long-duration gamma-ray bursts (GRBs) including the subclass of X-ray flashes (XRFs) have been revealed to be a rare variety of Type Ibc supernova (SN). While all these events...
Berger, E., Chary, R., Cowie, L. L., Price, P. A., Schmidt, B. P., Fox, D. B., ...
We present deep Hubble Space Telescope and Spitzer Space Telescope observations of the host galaxy of GRB 050904 at z=6.295. The host is detected in the H-band and marginally at 3.6 micron. From...
A Broader Perspective on the GRB-SN Connection (2006)
Over the last few years our understanding of local Type Ibc supernovae and their connection to long-duration gamma-ray bursts has been revolutionized. Recent discoveries have shown that the emerging...
The Afterglow, Energetics and Host Galaxy of the Short-Hard Gamma-Ray Burst 051221a (2006)
Soderberg, A. M., Berger, E., Kasliwal, M., Frail, D. A., Price, P. A., Schmidt, B. P., ...
We present detailed optical, X-ray and radio observations of the bright afterglow of the short gamma-ray burst 051221a obtained with Gemini, Swift/XRT, and the Very Large Array, as well as optical...
On the progenitor of SN 2005gl and the nature of Type IIn supernovae (2006)
Gal-Yam, Avishay, Leonard, D. C., Fox, D. B., Cenko, S. B., Soderberg, A. M., ...
We present a study of the type IIn supernova (SN) 2005gl, in the relatively nearby (d~66 Mpc) galaxy NGC 266. Photometry and spectroscopy of the SN indicate it is a typical member of its class....
A photometric redshift of z = 6.39 ¿ 0.12 for GRB 050904 (2006)
Haislip, J.B., Nysewander, M.C., Reichart, D.E., Levan, A.J., Tanvir, N., Cenko, S.B., ...
Gamma-ray bursts (GRBs) and their afterglows are the most brilliant transient events in the Universe. Both the bursts themselves and their afterglows have been predicted to be visible out to...
Soderberg, A. M., Chevalier, R. A., Kulkarni, S. R., Frail, D. A.
We report extensive radio and X-ray observations of SN 2003bg whose spectroscopic evolution shows a transition from a broad-lined Type Ic to a hydrogen-rich Type II and later to a typical...
The afterglow of GRB050709 and the nature of the short-hard gamma-ray bursts (2005)
Fox, D. B., Frail, D. A., Price, P. A., Kulkarni, S. R., Berger, E., Piran, T., ...
The final chapter in the long-standing mystery of the gamma-ray bursts (GRBs) centres on the origin of the short-hard class, suspected on theoretical grounds to result from the coalescence of neutron...
The Progenitors of Short-Hard Gamma-Ray Bursts from an Extended Sample of Events (2005)
Gal-Yam, Avishay, Nakar, Ehud, Ofek, Eran, Fox, D. B., Cenko, S. B., Kulkarni, S. R., ...
The detection of the afterglow emission and host galaxies of short-hard gamma-ray bursts (SHBs) is one of the most exciting recent astronomical discoveries. Indications that SHB progenitors belong to...
The afterglow and elliptical host galaxy of the short gamma-ray burst GRB 050724 (2005)
Berger, E., Price, P. A., Cenko, S. B., Gal-Yam, A., Soderberg, A. M., Kasliwal, M., ...
Despite a rich phenomenology, gamma-ray bursts (GRBs) are divided into two classes based on their duration and spectral hardness -- the long-soft and the short-hard bursts. The discovery of afterglow...
Soderberg, A. M., Nakar, E., Kulkarni, S. R., Berger, E.
We present late-time radio observations of 68 local Type Ibc supernovae, including six events with broad optical absorption lines (``hypernovae''). None of these objects exhibit radio emission...
A high angular-resolution search for the progenitor of the type Ic Supernova 2004gt (2005)
Gal-Yam, A., Fox, D. B., Kulkarni, S. R., Matthews, K., Leonard, D. C., Sand, D. J., ...
We report the results of a high-spatial-resoltion search for the progenitor of type Ic supernova SN 2004gt, using the newly commissioned Keck laser-guide star adaptive optics system (LGSAO) along...
The Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow up of sixteen Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data...
An HST Study of the Supernovae Accompanying GRB 040924 and GRB 041006 (2005)
Soderberg, A. M., Kulkarni, S. R., Price, P. A., Fox, D. B., Berger, E., ...
We present the results from a {\it Hubble Space Telescope/ACS} study of the supernovae associated with gamma-ray bursts 040924 ($z=0.86$) and 041006 ($z=0.71$). We find evidence that both GRBs were...
An Atlas of Spectrophotometric Landolt Standard Stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa, ...
We present CCD observations of 102 Landolt standard stars obtained with the R-C spectrograph on the CTIO 1.5 m telescope. Using stellar atmosphere models we have extended the flux points to our six...
An HST Search for Supernovae Accompanying X-ray Flashes (2005)
Soderberg, A. M., Kulkarni, S. R., Fox, D. B., Berger, E., Price, P. A., Cenko, S. B., ...
We present the results from an Hubble Space Telescope/ACS search for supernovae associated with X-ray flashes 020903, 040701, 040812 and 040916. We find strong evidence that XRF 020903 (z=0.25) was...
The Discovery of the Optical and Near-IR Afterglows of the First Swift Gamma-Ray Bursts (2005)
Berger, E., Fox, D. B., Kulkarni, S. R., Krzeminski, W., Soderberg, A. M., Frail, D. A., ...
We present optical and near-infrared searches for afterglow emission from the first four Swift bursts with accurate positions from the X-ray Telescope (XRT). Using telescopes at Las Campanas, Keck,...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa, ...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
Afterglows, redshifts, and properties of swift gammaray bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M.., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
Afterglows, redshifts, and properties of swift gammaray bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M.., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
Afterglows, Redshifts, and Properties of Swift Gamma-Ray Bursts (2005)
Berger, E., Kulkarni, S. R., Fox, D. B., Soderberg, A. M., Harrison, F. A., Nakar, E., ...
We present optical, near-IR, and radio follow-up of 16 Swift bursts, including our discovery of nine afterglows and a redshift determination for three. These observations, supplemented by data from...
An atlas of spectrophotometric landolt standard stars (2005)
Stritzinger, Maximilian, Suntzeff, Nicholas B., Hamuy, Mario, Challis, Peter, Demarco, Ricardo, Germany, Lisa M., ...
We present CCD observations of 102 Landolt standard stars obtained with the Ritchey-Chrétien spectrograph on the Cerro Tololo Inter-American Observatory 1.5 m telescope. Using stellar atmosphere...
The Radio and X-ray Luminous Type Ibc Supernova 2003L (2004)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Chevalier, R. A., Frail, D. A., Fox, D. B., ...
We present extensive radio observations of SN 2003L, the most luminous and energetic Type Ibc radio supernova with the exception of SN 1998bw (associated with GRB 980425). Observations from the Very...
The Caltech Core-Collapse Project (CCCP) (2004)
Gal-Yam, A., Cenko, S. B., Fox, D. W., Leonard, D. C., Sand, D. J., ...
The cosmological utility of type Ia Supernovae (SNe) prompted numerous studies of these events, and they are now well characterized observationally, both as individual objects and as a population. In...
The sub-energetic GRB 031203 as a cosmic analogue to GRB 980425 (2004)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Fox, D. W., Sako, M., Frail, D. A., ...
Over the six years since the discovery of the gamma-ray burst GRB 980425, associated with the nearby (distance, ~40 Mpc) supernova 1998bw, astronomers have fiercely debated the nature of this event....
Accurate Calorimetry of GRB 030329 (2004)
Frail, D. A., Soderberg, A. M., Kulkarni, S. R., Berger, E., Yost, S. A., Fox, D. W., ...
We report late-time observations of the radio afterglow of GRB 030329. The light curves show a clear achromatic flattening at 50 days after the explosion. We interpret this flattening as resulting...
The J-band Light Curve of SN 2003lw, Associated with GRB 031203 (2004)
Gal-Yam, A., Fox, D. B., Soderberg, A. M., Kulkarni, S. R., Berger, E., ...
At z=0.1055, the gamma-ray burst GRB 031203 is one of the two nearest GRBs known. Using observations from the Very Large Array (VLA) and Chandra X-ray Observatory, we derive sub-arcsecond...
Constraints on Off-Axis GRB Jets in Type Ibc Supernovae From Late-Time Radio Observations (2004)
Soderberg, A. M., Frail, D. A., Wieringa, M. H.
It has been suggested that the peculiar properties of the luminous Type Ic supernova SN 1998bw and its low-energy gamma-ray burst GRB 980425 may be understood if they originated in a standard...
CXO observation of GRB 040812. (2004)
Patel, S., Kouveliotou, C., Mereghetti, S., Gotz, D., Lund, N., Chenevez, J., ...
A Redshift Determination for XRF 020903: First Spectroscopic Observations of an X-Ray Flash (2003)
Soderberg, A. M., Kulkarni, S. R., Berger, E., Fox, D. B., Price, P. A., Yost, S. A., ...
We report the discovery of optical and radio afterglow emission from the extremely soft X-ray flash, XRF 020903. Our spectroscopic observations provide the first redshift for an X-ray flash, thereby...
The bright optical afterglow of the nearby gamma-ray burst of 29 March 2003 (2003)
Price, P. A., Fox, D. W., Kulkarni, S. R., Peterson, B. A., Schmidt, B. P., Soderberg, A. M., ...
Many past studies of cosmological gamma-ray bursts (GRBs) have been limited because of the large distance to typical GRBs, resulting in faint afterglows. There has long been a recognition that a...
A Common Origin for Cosmic Explosions Inferred from Fireball Calorimetry (2003)
Berger, E., Kulkarni, S. R., Pooley, G., Frail, D. A., McIntyre, V., Wark, R. M., ...
Past studies suggest that long-duration gamma-ray bursts (GRBs) have a standard energy of E_gamma ~ 10^51 erg in ultra-relativistic ejecta when corrected for asymmetry ("jets"). However, recently a...
A Radio Survey of Type Ib and Ic Supernovae: Searching for Engine Driven Supernovae (2003)
Berger, E., Kulkarni, S. R., Frail, D. A., Soderberg, A. M.
The association of gamma-ray bursts (GRBs) and core-collapse supernovae (SNe) of Type Ib and Ic was motivated by the detection of SN 1998bw in the error box of GRB 980425 and the now-secure...
Cosmological Uses of Gamma-Ray Bursts (2003)
Djorgovski, S. G., Kulkarni, S. R., Frail, D. A., Harrison, F. A., Bloom, J. S., Berger, E., ...
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are starting to provide interesting or even unique new insights in observational cosmology. GRBs represent a new way of...
Berger, E., Soderberg, A. M., Frail, D. A., Kulkarni, S. R.
We present radio observations of GRB 020405 starting 1.2 days after the burst, which reveal a rapidly-fading ``radio flare''. Based on its temporal and spectral properties, we interpret the radio...
Discovery of Early Optical Emission from GRB 021211 (2003)
Fox, D. W., Price, P. A., Soderberg, A. M., Berger, E., Kulkarni, S. R., Sari, R., ...
We report our discovery and early time optical, near-infrared, and radio wavelength follow-up observations of the afterglow of the gamma-ray burst GRB 021211. Our optical observations, beginning 21...
The Cosmic Gamma-Ray Bursts and Their Host Galaxies in a Cosmological Context (2003)
Djorgovski, S. G., Kulkarni, S. R., Frail, D. A., Harrison, F. A., Bloom, J. S., Berger, E., ...
Studies of the cosmic gamma-ray bursts (GRBs) and their host galaxies are now starting to provide interesting or even unique new insights in observational cosmology. Observed GRB host galaxies have a...
Optical Spectropolarimetry of the GRB 020813 Afterglow (2002)
Barth, A. J., Sari, R., Cohen, M. H., Goodrich, R. W., Price, P. A., Fox, D. W., ...
The optical afterglow of gamma-ray burst 020813 was observed for 3 hours with the LRIS spectropolarimeter at the Keck-I telescope, beginning 4.7 hours after the burst was detected by HETE-2. The...
Soderberg, A. M., Ramirez-Ruiz, E.
The specific incidence of radio flares appears to be significantly larger than that of the prompt optical emission. This abundance, coupled with the reverse shock interpretation suggests that radio...