Power spectra of BATSE GRB time profiles

Details Power spectra of BATSE GRB time profiles Power spectra of BATSE GRB time profiles

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..428..241g&link_type=abstract

Fourth Huntsville gamma-ray burst symposium. AIP Conference Proceedings, Volume 428, pp. 241-245 (1998).

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Gamma-Ray Sources, Gamma-Ray Bursts, Gamma-Ray

Scientific paper

We present preliminary results of an investigation of the temporal variability of gamma-ray bursts using Fourier analysis. Power density spectra were generated in the frequency range 0<ν<=7.8125 Hz for bursts recorded with the BATSE Large Area Detectors in the 50-300 keV range. Typical burst power spectra were found to consist of a low-frequency noise component and a white noise component consistent with Poisson statistics. The low-frequency noise was modeled by a power law, with index α. We show that the distribution of power-law indices is asymmetric with the majority of events (~65%) having |α|>2. The limitations of applying the Fourier transform to nonstationary GRB time series will be discussed in the context of the distribution of power-law indices.

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