Tests for Spatial Isotropy of Three Thousand Gamma-Ray Bursts Found in BATSE Archival Data

Details Tests for Spatial Isotropy of Three Thousand Gamma-Ray Bursts Found in BATSE Archival Data Tests for Spatial Isotropy of Three Thousand Gamma-Ray Bursts Found in BATSE Archival Data

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000astl...26..672t&link_type=abstract

Astronomy Letters, Volume 26, Issue 10, October 2000, pp.672-678

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We apply isotropy tests to our new uniform catalog of cosmic gamma-ray bursts (GRBs) (Stern and Tikhomirova 1999). The catalog contains trigger and nontrigger bursts found in 1024-ms BATSE records over seven years. Based on this catalog, we confirm isotropy of the GRB spatial distribution for a sample that surpasses previous samples in size (2934 bursts) and in achieved threshold (fluxes down to 0.1 phot. cm^{-2} s^{-1}, which is a factor of 2 lower than the BATSE trigger threshold). We also confirm that there is no excess of bursts toward the galaxy M31.

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