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arxiv: 1011.4342 · v1 · pith:BBVBWNPCnew · submitted 2010-11-19 · 🌌 astro-ph.HE

A New Frequency-Luminosity Relation for Long GRBs?

T. N. Ukwatta , K. S. Dhuga , D. C. Morris , G. MacLachlan , W. C. Parke , L. C. Maximon , A. Eskandarian , N. Gehrels
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J. P. Norris A. Shenoy
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keywords alphaaroundburstsextractedfrequencygrbslongpower-law
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We have studied power density spectra (PDS) of 206 long Gamma-Ray Bursts (GRBs). We fitted the PDS with a simple power-law and extracted the exponent of the power-law (alpha) and the noise-crossing threshold frequency (f_th). We find that the distribution of the extracted alpha peaks around -1.4 and that of f_th around 1 Hz. In addition, based on a sub-set 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.

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