The Power Spectra of Two Classes of Long-duration Gamma-ray Bursts

Details The Power Spectra of Two Classes of Long-duration Gamma-ray Bursts The Power Spectra of Two Classes of Long-duration Gamma-ray Bursts

2003-01-28

arxiv.org/abs/astro-ph/0301549v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, a translated version from published in the Acta Astronomica Sinica, to appear in the Chinese Astronomy & A

Scientific paper

We have studied the averaged power density spectra (PDSs) of two classes of long-duration gamma-ray bursts in the recent classification by Balastegui et al.(2001) based on neural network analysis. Both PDSs follow a power law over a wide frequency range with approximately the same slope, which indicates that a process with a self-similar temporal property may underlie the emission mechanisms of both. The two classes of bursts are divided into groups according to their brightness and spectral hardness respectively and each group's PDS was calculated; For both classes, the PDS is found to flatten both with increasing burst brightness and with increasing hardness.

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