Evidence of a Long-Duration Component in the Prompt Emission of Short Gamma-Ray Bursts Detected with B eppo SAX | Zendy

Enrico Montanari | Zendy; F. Frontera | Zendy; C. Guidorzi | Zendy; Massimo Rapisarda | Zendy

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Evidence of a Long-Duration Component in the Prompt Emission of Short Gamma-Ray Bursts Detected with B eppo SAX

Author(s) -

Enrico Montanari,

F. Frontera,

C. Guidorzi,

Massimo Rapisarda

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/430759

Subject(s) - physics , gamma ray burst , duration (music) , astrophysics , component (thermodynamics) , event (particle physics) , astronomy , acoustics , thermodynamics

A statistical study on the light curves of all the short Gamma-Ray Burstsdetected with the Gamma Ray Burst Monitor (GRBM) aboard BeppoSAX is reported.Evidence for a very weak and long duration component associated with theseevents in the two 1 s counters of the GRBM (40-700 keV and >100 keV) is found.It starts a few tens of seconds before the burst and continues for about 30 safter the burst. The overall hardness of this component is comparable with thatof the event itself. The detection of a signal before the onset time and thesimilar hardness are consistent with an interpretation of the long durationcomponent in terms of prompt emission associated with short GRBs.Comment: 12 pages, 6 figures, accepted for publication in ApJ

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