New Statistical Results on the Angular Distribution of Gamma-Ray Bursts

Details New Statistical Results on the Angular Distribution of Gamma-Ray Bursts New Statistical Results on the Angular Distribution of Gamma-Ray Bursts

2009-02-27

arxiv.org/abs/0902.4812v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

in GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference

Scientific paper

10.1063/1.2943523

We presented the results of several statistical tests of the randomness in the angular sky-distribution of gamma-ray bursts in BATSE Catalog. Thirteen different tests were presented based on Voronoi tesselation, Minimal spanning tree and Multifractal spectrum for five classes (short1, short2, intermediate, long1, long2) of gamma-ray bursts, separately. The long1 and long2 classes are distributed randomly. The intermediate subclass, in accordance with the earlier results of the authors, is distributed non-randomly. Concerning the short subclass earlier statistical tests also suggested some departure from the random distribution, but not on a high enough confidence level. The new tests presented in this article suggest also non-randomness here.

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