Anomalous grouping of some short BATSE GRBs

Details Anomalous grouping of some short BATSE GRBs Anomalous grouping of some short BATSE GRBs

2009-12-19

arxiv.org/abs/0912.3913v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

2009 Fermi Symposium - to appear in eConf Proceedings C091122

Scientific paper

The power spectra of 457 short BATSE bursts were analyzed, focusing on the 64
ms lightcurves' tails in the low energy bands. Using MC simulations, 22 GRBs
were identified with unusually high harmonic power above 0.03 Hz. The sky
distribution of these bursts shows an extraordinarily strong dipole moment with
a 99.994% significance.

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