BROADBAND STUDY OF GRB 091127: A SUB-ENERGETIC BURST AT HIGHER REDSHIFT?

作者：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 A; 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; Yamaoka K

来源：Astrophysical Journal, 2012, 761(1): 50.

DOI：10.1088/0004-637X/761/1/50

• gamma-ray burst: individual (GRB 091127)

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-gamma %26lt; 3 x 10(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.

• 出版日期2012-12-10