Journal Article

A new frequency–luminosity relation for long gamma-ray bursts?

T. N. Ukwatta, K. S. Dhuga, D. C. Morris, G. MacLachlan, W. C. Parke, L. C. Maximon, A. Eskandarian, N. Gehrels, J. P. Norris and A. Shenoy

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 412, issue 2, pages 875-882
Published in print April 2011 | ISSN: 0035-8711
Published online March 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17944.x
A new frequency–luminosity relation for long gamma-ray bursts?

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We have studied power density spectra (PDS) of 206 long gamma-ray bursts. We fitted the PDS with a simple power law and extracted the exponent of the power law (α) and the noise-crossing threshold frequency (fth). We find that the distribution of the extracted α peaks around −1.4 and that of fth around 1 Hz. In addition, based on a subset of 58 bursts with known redshifts, we show that the redshift-corrected threshold frequency is positively correlated with the isotropic peak luminosity. The correlation coefficient is 0.57 ± 0.03.

Keywords: gamma-ray burst: general

Journal Article.  4756 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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