GRB 070311: A COMMON ORIGIN FOR THE PROMPT AND AFTERGLOW EMISSION

被引：1
作者：
Vergani, S. D. [1 ,2 ,3 ]
Guidorzi, C. [4 ,5 ]
机构：
[1] DIAS, Dublin 2, Ireland
[2] Dublin City Univ, Sch Phys Sci, Dublin 9, Ireland
[3] Dublin City Univ, NCPST, Dublin 9, Ireland
[4] Univ Milan, I-20126 Milan, Italy
[5] INAF Osservatorio Astron Brera, I-23807 Merate, LC, Italy
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2008年 / 17卷 / 09期
关键词：
Gamma rays; bursts;
D O I：
10.1142/S0218271808012917
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
GRB 070311 was a long burst that triggered INTEGRAL. We present prompt gamma-ray, early NIR/optical, late optical and X-ray data on this burst and its afterglow. Interestingly, the H-band light curve acquired with REM exhibits two pulses at 80 and 140 s after the peak of the gamma-ray burst, with possible evidence for a contemporaneous faint gamma-ray tail. The late optical and X-ray afterglow underwent a rebrightening between 3 x 10(4) and 2 x 10(5) s after the burst with energy comparable with that of the prompt emission extrapolated in the X-ray band. After fitting the early gamma-ray and optical light curves, we modelled the time profile of the late rebrightening as the time-rescaled version of the prompt gamma-ray pulse over an underlying power law. This result supports a common origin for both prompt and late X-ray/optical afterglow rebrightening of GRB 070311 within the external shock scenario.
引用
收藏
页码：1359 / 1362
页数：4
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