A Correlated Optical and Gamma Emission from GRB 081126A

Details A Correlated Optical and Gamma Emission from GRB 081126A A Correlated Optical and Gamma Emission from GRB 081126A

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1279..318g&link_type=abstract

DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 318-320 (2010).

Astronomy and Astrophysics

Astronomy

Gamma-Ray Sources (Astronomical), Photometry, Astronomical Telescopes, Spacecraft, Gamma-Ray Sources, Gamma-Ray Bursts, Photometric, Polarimetric, And Spectroscopic Instrumentation, X- And Gamma-Ray Telescopes And Instrumentation, Spacecraft/Atmosphere Interactions

Scientific paper

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, 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 sec. 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.

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