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A tale of two GRB-SNe at a common redshift of z = 0.54
Z. Cano, D. Bersier, C. Guidorzi +71
We present ground-based and HST optical observations of the optical transients (OTs) of long-duration Gamma Ray Bursts (GRBs) 060729 and 090618, both at a redshift of z = 0.54. For…
Detection of a Thermal Spectral Component in the Prompt Emission of GRB 100724B
Sylvain Guiriec, Valerie Connaughton, Michael S. Briggs +29
Observations of GRB 100724B with the Fermi Gamma-Ray Burst Monitor (GBM) find that the spectrum is dominated by the typical Band functional form, which is usually taken to represen…
Detailed Radio View on Two Stellar Explosions and Their Host Galaxy: XRF080109/SN2008D and SN2007uy in NGC2770
A. J. van der Horst, A. P. Kamble, Z. Paragi +16
The galaxy NGC2770 hosted two core-collapse supernova explosions, SN2008D and SN2007uy, within 10 days of each other and 9 years after the first supernova of the same type, SN1999e…
Time-Resolved Spectroscopy of the 3 Brightest and Hardest Short Gamma-Ray Bursts Observed with the FGST Gamma-Ray Burst Monitor
Sylvain Guiriec, Michael S. Briggs, Valerie Connaugthon +25
From July 2008 to October 2009, the Gamma-ray Burst Monitor (GBM) on board the Fermi Gamma-ray Space Telescope (FGST) has detected 320 Gamma-Ray Bursts (GRBs). About 20% of these e…
Fermi observations of high-energy gamma-ray emission from GRB 090217A
Fermi-LAT, Fermi-GBM Collaborations
The Fermi observatory is advancing our knowledge of Gamma-Ray Bursts (GRBs) through pioneering observations at high energies, covering more than 7 decades in energy with the two on…
Photospheric radius expansion during magnetar bursts
Anna L. Watts, Chryssa Kouveliotou, Alexander J. van der Horst +6
On August 24th 2008 the new magnetar SGR 0501+4516 (discovered by SWIFT) emitted a bright burst with a pronounced double-peak structure in hard X-rays, reminiscent of the double-pe…
Fermi Observations of GRB 090510: A Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 keV to GeV Energies
The Fermi LAT, GBM Collaborations
We present detailed observations of the bright short-hard gamma-ray burst GRB 090510 made with the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) on board the Fermi o…
Discovery of a new Soft Gamma Repeater, SGR J1833-0832
E. Gogus, G. Cusumano, A. J. Levan +20
On 2010 March 19, the Swift/Burst Alert Telescope triggered on a short burst with temporal and spectral characteristics similar to those of Soft Gamma Repeater (SGR) bursts. The so…
Discovery of the nearby long, soft GRB 100316D with an associated supernova
R. L. C. Starling, K. Wiersema, A. J. Levan +43
We report the Swift discovery of nearby long, soft gamma-ray burst GRB 100316D, and the subsequent unveiling of its low redshift host galaxy and associated supernova. We derive the…
Fermi detection of delayed GeV emission from the short GRB 081024B
Fermi LAT Collaboration, Fermi GBM Collaboration
We report on the detailed analysis of the high-energy extended emission from the short Gamma-Ray Burst (GRB) 081024B, detected by the Fermi Gamma-ray Space Telescope. Historically,…
A mildly relativistic radio jet from the otherwise normal Type Ic Supernova 2007gr
Z. Paragi, G. B. Taylor, C. Kouveliotou +11
The class of type Ic supernovae have drawn increasing attention since 1998 owing to their sparse association (only four so far) with long duration gamma-ray bursts. Although both p…
Fermi/Gamma-ray Burst Monitor detection of SGR J1550-5418
Y. Kaneko, E. Gogus, C. Kouveliotou +3
SGR J1550-5418 exhibited three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds of typical Soft Gamma Repeater (SGR) bursts in soft gamma-r…