Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1000...36g&link_type=abstract
GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 36-39 (2008).
Physics
Gamma-Ray Sources, Gamma-Ray Bursts, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Gamma Transitions And Level Energies
Scientific paper
We test the correlation between temporal variability and peak luminosity of the gamma-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination. This is the first time that this correlation can be tested on a homogeneous data sample. The correlation is confirmed, as long as the 6 GRBs with low luminosity (<5×1050 erg s-1 in the rest-frame 100-1000 keV energy band) are ignored. We confirm that the considerable scatter of the correlation already known is not due to the combination of data from different instruments with different energy bands, but it is intrinsic to the correlation itself. Thanks to the unprecedented sensitivity of Swift/BKT, the variability/peak luminosity correlation is tested on low-luminosity GRBs. Our results show that these GRBs are outliers.
Campana Sergio
Capalbi Milvia
Chincarini Guido
Covino Stefano
Cusumano Giancarlo
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