Gamma-Ray Bursts from the BATSE catalog on-line, available at www.batse.msfc.nasa.gov/, have been divided according to their hardness ratio HR, defined as the ratio of the 100-300 keV peak flux to the 50-100 keV one. Intensity distributions in peak flux, fluence and count rate, as well as duration and locations distributions in the sky, have been derived. Special attention has been given to the effect of excluding events affected by large measurement errors. The difference in intensity distributions of GRBs in different HR groups, particularly at HR < 1.5, already shown by Pizzichini, Proceedings 24th ICRC, Rome 1995, is confirmed with stronger significance.
19th Texas Symposium on Relativistic Astrophysics and Cosmology
- Pub Date:
- December 1998