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SN 2006gy: An extremely luminous supernova in the galaxy NGC 1260
E. O. Ofek, P. B. Cameron, M. M. Kasliwal +8
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 observatio…
SGRs in nearby galaxies: rate, luminosity function and fraction among short GRBs
Eran O. Ofek
It was suggested that some of the short-duration Gamma-Ray Bursts (GRB) are giant flares of Soft Gamma-ray Repeaters (SGR) in nearby galaxies. To test this hypothesis, I have const…
The Incidence of Dwarf Novae in Large Area Transient Searches
A. Rau, R. Schwarz, S. R. Kulkarni +6
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…
A New Population of High Redshift Short-Duration Gamma-Ray Bursts
E. Berger, D. B. Fox, P. A. Price +23
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…
The short-hard GRB 051103: Observations and implications for its nature
E. O. Ofek, S. R. Kulkarni, E. Nakar +6
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-Un…
The gamma-ray burst GRB060614 requires a novel explosive process
A. Gal-Yam, D. Fox, P. Price +26
Over the past decade our physical understanding of gamma-ray bursts (GRBs) has progressed rapidly thanks to the discovery and observation of their long-lived afterglow emission. Lo…
Multi-Wavelength Observations of GRB 050820A: An Exceptionally Energetic Event Followed from Start to Finish
S. B. Cenko, M. Kasliwal, F. A. Harrison +25
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 mar…
A Time Delay for the Largest Gravitationally Lensed Quasar: SDSS J1004+4112
J. Fohlmeister, C. S. Kochanek, E. E. Falco +12
We present 426 epochs of optical monitoring data spanning 1000 days from December 2003 to June 2006 for the gravitationally lensed quasar SDSS J1004+4112. The time delay between th…
A Spectacular Radio Flare from XRF 050416a at 40 days and Implications for the Nature of X-ray Flashes
A. M. Soderberg, E. Nakar, S. B. Cenko +26
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, pla…
An Energetic Afterglow From A Distant Stellar Explosion
D. A. Frail, P. B. Cameron, M. Kasliwal +10
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 gamm…
Physics of the GRB 030328 afterglow and its environment
E. Maiorano, N. Masetti, E. Palazzi +30
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 dif…
Relativistic ejecta from XRF 060218 and the rate of cosmic explosions
A. M. Soderberg, S. R. Kulkarni, E. Nakar +22
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…