학술논문
Broadband Study of GRB 091127: A Sub-Energetic Burst at Higher Redshift?
Document Type
Report
Author
Troja, E; Sakamoto, T; Guidorzi, C; Norris, J. P; Panaitescu, A; Kobayashi, S; Omodei, N; Brown, J. C; Burrows, D. N; Evans, P. A; Gehrels, N; Marshall, F. E; Mawson, N; Melandri; Mundell, C. G; Oates, S. R; Pal'shin, V; Preece, R. D; Racusin, J. L; Steele, I. A; Tanvir, N. R; Vasileiou, V; Wilson-Hodge, C
Source
Subject
Language
English
Abstract
GRB 091127 is a bright gamma-ray burst (GRB) detected by Swift at a redshift z=0.49 and associated with SN 2009nz. We present the broadband analysis of the GRB prompt and afterglow emission and study its high-energy properties in the context of the GRB/SN association. While the high luminosity of the prompt emission and standard afterglow behavior are typical of cosmological long GRBs, its low energy release (E(sub gamma),<3x10(exp 49) erg), soft spectrum and unusual spectral lag connect this GRB to the class of sub-energetic bursts. We discuss the suppression of high-energy emission in this burst, and investigate whether this behavior could be connected with the sub-energetic nature of the explosion. Subject headings: gamma-ray bursts: individual (GRB 091127)