Revisiting the log N-log P distribution of gamma-ray bursts

Details Revisiting the log N-log P distribution of gamma-ray bursts Revisiting the log N-log P distribution of gamma-ray bursts

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..428...72t&link_type=abstract

Fourth Huntsville gamma-ray burst symposium. AIP Conference Proceedings, Volume 428, pp. 72-76 (1998).

Computer Science

Databases

1

Gamma-Ray Sources, Gamma-Ray Bursts, Gamma-Ray, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Observational Cosmology

Scientific paper

The brightness (cumulative log N-log P) distribution provides information on the intrinsic and spatial properties of the gamma-ray burst (GRB) population. The brightness distribution for the whole sample of GRBs shows a clear deviation from a three-dimensional Euclidean distribution. However, when spectral/duration classes are considered, GRBs show quite distinct properties from their log N-log P distributions. We find that among the whole sample of GRBs of the 3B catalogue, only the long/hard GRBs show a strong deviation from the Euclidean distribution. This property is at odds with simple extragalactic models of GRB formation, unless a strong spectral and luminosity cosmological evolution is invoked. The existence of multiple GRB populations with different origins cannot be excluded.

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