GRB 011121: A massive star progenitor
Price, Paul; Berger, Edo; Reichart, D E; Kulkarni, Shrinivas R; Yost, S A; Subrahamanyan, R; Wark, R M; Wieringa, Mark H; Frail, Dale A; Bailey, Jeremy Alexander; Boyle, Brian John; Corbett, E A; Gunn, K; Ryder, Stuart; Seymour, N; Koviak, K; McCarthy, P J; Phillips, Matthew R; Axelrod, Tim; Bloom, J S; Djorgovski, S G; Fox, Derek B; Galama, T J; Harrison, F A; Hurley, K C; Sari, R; Brown, M J I; Cline, T; Frontera, F; Guidorzi, C; Montanari, E
Of the cosmological gamma-ray bursts, GRB 011121 has the lowest redshift, z = 0.36. More importantly, the multicolor excess in the afterglow detected in the Hubble Space Telescope (HST) light curves is compelling observational evidence of an underlying supernova. Here we present near-infrared and radio observations of the afterglow, and from our comprehensive afterglow modeling, we find evidence favoring a wind-fed circumburst medium. Lacking X-ray data, we are unable to conclusively measure...[Show more]
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