Testing the Intrinsic Randomnesses in the Angular Distributions of Gamma-Ray Bursts

Details Testing the Intrinsic Randomnesses in the Angular Distributions of Gamma-Ray Bursts Testing the Intrinsic Randomnesses in the Angular Distributions of Gamma-Ray Bursts

1999-12-03

arxiv.org/abs/astro-ph/9912076v1

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, contribution in 5th Huntsville Gamma-Ray Burst Symposium Proceedings

Scientific paper

10.1063/1.1361516

The counts-in-cells and the two-point angular correlation function method are used to test the randomnesses in the angular distributions of both the all gamma-ray bursts collected at BATSE Catalog, and also their three subclasses ("short", "intermediate", "long"). The methods elimate the non-zero sky-exposure function of BATSE instrument. Both tests suggest intrinsic non-randomnesses for the intermediate subclass; for the remaining three cases only the correlation function method. The confidence levels are between 95% and 99.9%. Separating the GRBs into two parts ("dim half" and "bright half", respectively) we obtain the result that the "dim" half shows a non-randomness on the 99.3% confidence level from the counts-in-cells test.

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