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Discovery of SN 2009nz Associated with GRB 091127
B. E. Cobb, J. S. Bloom, D. A. Perley +3
We report SMARTS, Gemini and Swift-UVOT observations of the optical transient (OT) associated with gamma-ray burst (GRB) 091127, at redshift 0.49, taken between 0.9 hr and 102 days…
Afterglow Observations of Fermi-LAT Gamma-Ray Bursts and the Emerging Class of Hyper-Energetic Events
S. B. Cenko, D. A. Frail, F. A. Harrison +21
We present broadband (radio, optical, and X-ray) light curves and spectra of the afterglows of four long-duration gamma-ray bursts (GRBs 090323, 090328, 090902B, and 090926A) detec…
VLBI observations of SN 2008iz: I. Expansion velocity and limits on anisotropic expansion
A. Brunthaler, I. Marti-Vidal, K. M. Menten +9
We present observations of the recently discovered supernova 2008iz in M82 with the VLBI High Sensitivity Array at 22 GHz, the Very Large Array at frequencies of 1.4, 4.8, 8.4, 22…
Evidence for Supernova-Synthesised Dust from the Rising Afterglow of GRB 071025 at z~5
Daniel A. Perley, J. S. Bloom, C. R. Klein +21
We present observations and analysis of the broadband afterglow of Swift GRB 071025. Using optical and infrared (RIYJHK) photometry, we derive a photometric redshift of 4.4 < z < 5…