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Gamma-ray burst classes found in the RHESSI data sample

SYSNO ASEP	0355599
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Gamma-ray burst classes found in the RHESSI data sample
Author(s)	Řípa, J. (CZ) Wigger, C. (CH) Huja, D. (CZ) Hudec, René (ASU-R)_{RID, ORCID}
Source Title	Baltic Astronomy - ISSN 1392-0049 Roč. 18, 3-4 (2009), s. 305-309
Number of pages	5 s.
Action	INTEGRAL/BART workshop 2009
Event date	26.03.2009-29.03.2009
VEvent location	Karlovy Vary
Country	CZ - Czech Republic
Event type	EUR
Language	eng - English
Country	LT - Lithuania
Keywords	gamma rays ; bursts
Subject RIV	BN - Astronomy, Celestial Mechanics, Astrophysics
R&D Projects	GD205/08/H005 GA ČR - Czech Science Foundation (CSF)
	GA205/08/1207 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z10030501 - ASU-R (2005-2011)
UT WOS	000276474400013
Annotation	A sample of 427 gamma-ray bursts (GRBs), measured by the RHESSI satellite, is studied statistically to determine the number of ORB groups. Previous studies based on the BATSE Catalog and recently on the Swift data claim the existence of an intermediate GRB group, besides the long and short groups. Using only the GRB durations T-90 and chi(2) or F-test, we have not found any statistically significant intermediate group. However, the maximum likelihood ratio test, one-dimensional as well as two-dimensional hardness vs. T-90 plane, reveal the reality of an intermediate group. Hence, the existence of this group follows not only from the BATSE and Swift datasets, but also from the RHESSI results.
Workplace	Astronomical Institute
Contact	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Year of Publishing	2011

Number of the records: 1