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Astrophysics > High Energy Astrophysical Phenomena

arXiv:1304.0348 (astro-ph)
[Submitted on 1 Apr 2013]

Title:Investigation of the spectral lag - energy relation of GRBs registered by INTEGRAL

Authors:P. Minaev, A. Pozanenko, S. Grebenev, S. Molkov
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Abstract:We investigated the dependence of spectral lag on energy band based on 28 bright GRBs detected by the SPI and IBIS/ISGRI instruments on the INTEGRAL observatory. It is found that for simple structured bursts or well separated pulses of multi-pulse bursts the spectral lag can be approximated by the relation t=Alog(E), where A is a positive parameter, which correlates with pulse duration. We have not found any negative lag in simple structured bursts or in well separated pulses. While investigating the time profile of the whole burst negative lag may appear due to different spectral parameters of the pulses.
Comments: 6 pages, 2 figures, Proceedings of "An INTEGRAL view of the high-energy sky (the first 10 years)" the 9th INTEGRAL Workshop, October 15-19, 2012, Paris, France, in Proceedings of Science (INTEGRAL 2012), Eds. A. Goldwurm, F. Lebrun and C. Winkler, (this http URL), id 127
Subjects: High Energy Astrophysical Phenomena (astro-ph.HE)
Cite as: arXiv:1304.0348 [astro-ph.HE]
  (or arXiv:1304.0348v1 [astro-ph.HE] for this version)
  https://doi.org/10.48550/arXiv.1304.0348

Submission history

From: Pavel Minaev [view email]
[v1] Mon, 1 Apr 2013 13:18:56 UTC (700 KB)
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