Počet záznamů: 1

Gamma-ray burst classes found in the RHESSI data sample

  1. 1.
    0355599 - ASU-R 2011 RIV LT eng J - Článek v odborném periodiku
    Řípa, J. - Wigger, C. - Huja, D. - Hudec, René
    Gamma-ray burst classes found in the RHESSI data sample.
    Baltic Astronomy. Roč. 18, 3-4 (2009), s. 305-309 ISSN 1392-0049.
    [INTEGRAL/BART workshop 2009. Karlovy Vary, 26.03.2009-29.03.2009]
    Grant CEP: GA ČR GD205/08/H005; GA ČR GA205/08/1207
    Grant ostatní:ESA(XE) ESA-PECS project No. 98023
    Výzkumný záměr: CEZ:AV0Z10030501
    Klíčová slova: gamma rays * bursts
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
    Impakt faktor: 1.032, rok: 2009

    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.
    Trvalý link: http://hdl.handle.net/11104/0194333