The gamma-ray burst variability-peak luminosity correlation: new results
Abstract
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.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2005
- DOI:
- 10.1111/j.1365-2966.2005.09450.x
- arXiv:
- arXiv:astro-ph/0507588
- Bibcode:
- 2005MNRAS.363..315G
- Keywords:
-
- methods: data analysis;
- gamma-rays: bursts;
- Astrophysics
- E-Print:
- 11 pages, 10 figures, MNRAS, accepted