The redshift distribution of long gamma-ray bursts

Details The redshift distribution of long gamma-ray bursts The redshift distribution of long gamma-ray bursts

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..836..546d&link_type=abstract

GAMMA-RAY BURSTS IN THE SWIFT ERA: Sixteenth Maryland Astrophysics Conference. AIP Conference Proceedings, Volume 836, pp. 546-

Astronomy and Astrophysics

Astrophysics

Gamma-Ray Sources, Gamma-Ray Bursts, Cosmology

Scientific paper

We study the redshift distribution of Gamma-Ray Bursts (GRBs) with Montecarlo simulations, assuming a comoving rate proportional to the star formation rate. We then use the energy band and flux threshold of several instruments (BATSE, HETE2 and SWIFT) to compute the observed distributions. Model parameters are constrained by fitting simultaneously (i) the log(N)-log(P) diagram of BATSE bursts; (ii) the Epeak distribution of bright BATSE bursts; (iii) the proportion of X-ray rich GRBs and X-ray flashes observed by HETE-2. This allows us to predict the redshift distribution of GRBs detected by SWIFT. We compare it with actual data, in the aim to discriminate between different possible SFRs at high redshift.

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