The GRB variability/peak luminosity correlation: New results

C. Guidorzi, F. Frontera, E. Montanari, F. Rossi, L. Amati, A. Gomboc, K. Hurley, C. G. Mundell

Research output: Contribution to journalReview articlepeer-review


We test the correlation between time variability and isotropic-equivalent 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.

Original languageEnglish
Pages (from-to)307-310
Number of pages4
JournalNuovo Cimento della Societa Italiana di Fisica C
Issue number3
Early online date19 Oct 2005
Publication statusPublished - 2005

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Physics and Astronomy (miscellaneous)


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