Probing the Small-Scale Angular Distribution of Gamma-Ray Bursts with Combined BATSE/Ulysses 4B Locations

2); 2) ((1) University of Alabama in Huntsville; (2) NASA/Marshall Space Flight Center; (3) Space Sciences Laboratory; Berkeley); G. N. Pendleton (1; K. Hurley (3); R. M. Kippen (1; University of California

arxiv: astro-ph/9810040 · v1 · submitted 1998-10-02 · 🌌 astro-ph

Probing the Small-Scale Angular Distribution of Gamma-Ray Bursts with Combined BATSE/Ulysses 4B Locations

R. M. Kippen (1 , 2) , K. Hurley (3) , G. N. Pendleton (1 , 2) ((1) University of Alabama in Huntsville , (2) NASA/Marshall Space Flight Center , (3) Space Sciences Laboratory , University of California

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keywords batseburstsulysseslocationsangularcatalogdistributiongamma-ray

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We investigate the angular distribution of gamma-ray bursts using the largest catalog of well-localized events that is currently available---combined BATSE/Ulysses burst locations. We present the preliminary spatial analysis of 415 BATSE/Ulysses bursts included in the BATSE 4B catalog. We find that the locations are consistent with large- and small-scale isotropy, with no significant clustering or repetition. We also search for cross-correlation between the BATSE/Ulysses bursts and known extragalactic objects---such as Abell galaxy clusters, radio-quiet QSO, AGN and supernovae---and place limits on the fraction of bursts that could originate from these objects.

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Probing the Small-Scale Angular Distribution of Gamma-Ray Bursts with Combined BATSE/Ulysses 4B Locations

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