2003/11/30 by J. R. Lin, S. N. Zhang, T. P. Li
Physics and Astronomy · #astro-ph
paper · pdf · doi:10.1086/382503
published as Astrophys.J. 605 (2004) 819-822 · 12 pages, 2 figure
arxiv created 2004/04/20 · arxiv updated 2009/12/01
It is known that some observed gamma-ray bursts (GRBs) are produced at cosmological distances and that the GRB production rate may follow the star formation rate. We model the BATSE-detected intensity distribution of long GRBs in order to determine their space density distribution and opening angle distribution. Our main results are: the lower and upper distance limits to the GRB production are z 0.24 and >10, respectively; the GRB opening angle follows an exponential distribution and the mean opening angle is about 0.03 radians; and the peak luminosity appears to be a better standard candle than the total energy of a GRB.