On the Power Spectrum Density of Gamma Ray Bursts

Details On the Power Spectrum Density of Gamma Ray Bursts On the Power Spectrum Density of Gamma Ray Bursts

2001-04-13

arxiv.org/abs/astro-ph/0104232v1

Astronomy and Astrophysics

Astrophysics

10 pages, 4 figures, submitted to ApJ Letters

Scientific paper

10.1007/10856495_28

Gamma ray bursts (GRBs) are known to have short-time variability and power-law behavior with the index -1.67 in the power spectrum density. Reanalyzing the expanded data, we have found a) the power-law comes from the global profile of the burst and not from the self-similar shots nor rapid fluctuations in the luminosity profile. b) The power indices vary from burst to burst and the value -1.67 is given simply as the mean value of the distribution; there is no systematic correlation among GRBs to yield the power law.

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