The Small-Scale Angular Distribution of Gamma-Ray Bursts Using Combined BATSE/Ulysses Localization
Abstract
The existence of small-scale clustering in the angular distribution of gamma-ray burst locations would provide strong evidence against a cosmological origin. Numerous studies performed thus far have failed to identify any conclusive indication of clustering, but the sensitivity was typically poor due to inaccurate burst locations and/or few events. We improve on the earlier studies by analyzing more than 250 bursts which have been localized by the Burst and Transient Source Experiment (BATSE) and the two-spacecraft Compton/Ulysses Interplanetary Network. Combined BATSE/Ulysses localization (typical error ``boxes'' << 1 deg(2) ) of the numerous events in this catalog provides superior sensitivity to small-scale clustering and burst recurrence. We present results from the preliminary spatial analysis of the BATSE/Ulysses catalog and discuss implications for burst repetition models.
- Publication:
-
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1996
- Bibcode:
- 1996AAS...189.2804K