Periodicities in Gamma-Ray Bursts

Details Periodicities in Gamma-Ray Bursts Periodicities in Gamma-Ray Bursts

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..75..205p&link_type=abstract

Astrophysics and Space Science, Volume 75, Issue 1, pp.205-210

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

One of the most recent discoveries on gamma-ray bursts was the fact that one, or possibly two, of them had a pulsed emission with a periodicity of 8 and 4 s. The intensity of successive peaks decreased exponentially with time. We can speculate that the energy range and/or the lack of sensitivity are probably the reasons why periodicities were not discoverded in some other bursts. In fact, many time-histories show a double or multiple peak structure. If they were periodic, the distance between successive peaks would be equal to the period. Based on this extremely simplified assumption, a search on all available gamma-ray burst time-histories shows that most the periodicities above 1 s should be contained within an interval between 1 and 9 s, with a maximum at approximately 3 s.

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