OBSERVATION OF CORRELATED OPTICAL AND GAMMA EMISSIONS FROM GRB 081126

被引：12

作者：

Klotz, A. ^{[1
,2
]}

Gendre, B. ^{[3
]}

Atteia, J. L. ^{[4
]}

Boer, M. ^{[1
]}

Coward, D. M. ^{[5
]}

Imerito, A. C. ^{[5
]}

机构：

[1] Observ Haute Provence, St Michel Observ, F-04870 St Michel, France

[2] Univ Toulouse, CNRS, Observ Midi Pyrenees, CESR, F-31028 Toulouse 04, France

[3] Univ Aix Marseille 1, LAM, CNRS, F-13388 Marseille 13, France

[4] Univ Toulouse, CNRS, Observ Midi Pyrenees, LATT, F-31400 Toulouse, France

[5] Univ Western Australia, Sch Phys, Crawley, WA 6009, Australia

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 697卷 / 01期

关键词：

gamma rays: bursts; INFRARED-EMISSION; PROMPT; RADIATION;

D O I：

10.1088/0004-637X/697/1/L18

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of time-resolved optical emissions observed from the gamma-ray burst GRB 081126 during the prompt phase. The analysis employed time-resolved photometry using optical data obtained by the TAROT telescope, using BAT data from the Swift spacecraft, and time-resolved spectroscopy at high energies from the GBM instrument onboard the Fermi spacecraft. The optical emission of GRB 081126 is found to be compatible with the second gamma emission pulse shifted by a positive time lag of 8.4 +/- 3.9 s. This is the first well-resolved observation of a time lag between optical and gamma emissions during a gamma-ray burst. Our observations could potentially provide new constraints on the fireball model for gamma-ray burst early emissions. Furthermore, observations of time lags between optical and gamma ray photons provides an exciting opportunity to constrain quantum gravity theories.

引用

页码：L18 / L21

页数：4

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