The GRB variability/peak luminosity correlation: New results

Guidorzi, C. and Frontera, F. and Montanari, E. and Rossi, F. and Amati, L. and Gomboc, A. and Hurley, K. and Mundell, C. G. (2005) The GRB variability/peak luminosity correlation: New results. Il nuovo cimento C, 28 (3). pp. 307-310. ISSN 1826-9885

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We test the correlation between time variability and isotropicequivalent peak luminosity found by Reichart et al.(ApJ, 552 (2001) 57) using a set of 26 Gamma-Ray Bursts (GRBs) with known redshift. We confirm the correlation, though with a larger spread around the best-fit power-law obtained by Reichart et al. which in turn does not provide an acceptable description any longer. In addition, we find no evidence for correlation between variability and beaming-corrected peak luminosity for a subset of 14 GRBs whose beaming angles have been taken from Ghirlanda et al.(ApJ, 616 (2004) 331). Finally, we investigate the possible connection for some GRBs between the location in the variability/peak luminosity space and some afterglow properties, such as the detectability in the optical band, by adding some GRBs whose redshifts, unknown from direct measurements, have been derived assuming the Amati et al.(A&A, 390 (2002) 81) relationship.

Item Type: Article
Additional Information: Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004.
Uncontrolled Keywords: Time series analysis, time variability ; γ-ray sources; γ-ray bursts
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 15 Mar 2020 12:02
Last Modified: 15 Mar 2020 12:02

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