SIMBAD references

2009A&A...498..399R - Astronomy and Astrophysics, volume 498, 399-406 (2009/5-1)

Search for gamma-ray burst classes with the RHESSI satellite.

RIPA J., MESZAROS A., WIGGER C., HUJA D., HUDEC R. and HAJDAS W.

Abstract (from CDS):

We study a sample of 427 gamma-ray bursts (GRBs), measured by the RHESSI satellite, statistically with respect to duration and hardness ratio. Standard statistical tests were used, such as χ2, F-test, and the maximum likelihood ratio test, to compare the number of GRB groups in the RHESSI database with that of the BATSE database. Previous studies based on the BATSE Catalog claim the existence of an intermediate GRB group, besides the long and short groups. Using only the GRB duration T90 as information and χ2 or F-test, we do not find any statistically significant intermediate group in the RHESSI data. However, maximum likelihood ratio test reveals a significant intermediate group. Using the 2-dimensional hardness/T90 plane, the maximum likelihood analysis also reveals a significant intermediate group. In contrast to the BATSE database, the intermediate group in the RHESSI data set is harder than the long one. The existence of an intermediate group follows not only from the BATSE data set, but also from the RHESSI one.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts

VizieR on-line data: <Available at CDS (J/A+A/498/399): table7.dat>

Simbad objects: 208

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2021.05.15-01:53:22

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