Is the nearby Galactic disk still an option for GRBs?

Details Is the nearby Galactic disk still an option for GRBs? Is the nearby Galactic disk still an option for GRBs?

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...303l..65h&link_type=abstract

Astronomy and Astrophysics, v.303, p.L65

Astronomy and Astrophysics

Astrophysics

3

{Gamma}-Ray Bursts, Neutron Stars, Galactic Disk

Scientific paper

The BATSE experiment has now observed more than 1100 gamma-ray bursts. The observed angular distribution is isotropic. while the brightness distribution of bursts shows a reduced number of faint events. These observations favor a cosmological burst origin. Alternatively, very extended Galactic halo models are under consideration. Simple Galactic disk models are essentially ruled out, but a few models still invoke a very local disk origin. In the context of these local disk models, the location of the Sun above the Galactic midplane should cause a notable hemispheric asymmetry in the angular distribution and thus a dipole moment. We introduce the new dipole statistic to test for this effect. The value of his dipole moment for the BATSE 3B catalog is insignificant, which argues against this class of models.

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