Open AccessThe gamma‐ray burst variability–peak luminosity correlation: new results
Author(s) -
Guidorzi C.,
Frontera F.,
Montanari E.,
Rossi F.,
Amati L.,
Gomboc A.,
Hurley K.,
Mundell C. G.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09450.x
Subject(s) - physics , gamma ray burst , astrophysics , luminosity , redshift , correlation , power law , astronomy , isotropy , optics , galaxy , statistics , geometry , mathematics
We report test results of the correlation between the time variability and the peak luminosity of gamma‐ray bursts (GRBs), using a larger sample (32) of GRBs with known redshift than that available to Reichart et al., and using as a variability measure that introduced by these authors. The results are puzzling. Assuming an isotropic‐equivalent peak luminosity, as had Reichart et al., a correlation is still found, but it is less relevant and inconsistent with a power law as previously reported. Assuming as the peak luminosity that corrected for GRB beaming for a subset of 16 GRBs with known beaming angle, the correlation becomes slightly less significant.