Observations of the Prompt Gamma‐Ray Emission of GRB 070125
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Abstract
The long, bright gamma-ray burst GRB 070125 was localized by the Interplanetary Network. We present light curves of the prompt gamma-ray emission as observed by Konus-Wind, RHESSI, Suzaku WAM, and Swift BAT. We detail the results of joint spectral fits with Konus and RHESSI data. The burst shows moderate hard-to-soft evolution in its multipeaked emission over a period of about 1 minute. The total burst fluence as observed by Konus is 1:79 ; 10 4 ergs cm 2 (20 keVY10 MeV ). Using the spectroscopic redshift z 1:548, we find that the burst is consistent with the ''Amati'' E peak;i -E iso correlation. Assuming a jet opening angle derived from broadband modeling of the burst afterglow, GRB 070125 is a significant outlier to the ''Ghirlanda'' E peak;i -E correlation. Its collimation-corrected energy release, E 2:5 ; 10 52 ergs, is the largest yet observed.