Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999
Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
Page(s) 413 - 414
DOI https://doi.org/10.1051/aas:1999289
Published online 15 September 1999
DOI: 10.1051/aas:1999289



Astron. Astrophys. Suppl. Ser. 138, 413-414

Twelve hundred non-triggered gamma ray bursts

B. Stern1,4 - Ya. Tikhomirova2 - M. Stepanov3 - D. Kompaneets2 - A. Berezhnoy3 - R. Svensson4


1 - Institute for Nuclear Research, Russian Academy of Sciences, Moscow 117312, Russia
e-mail: stern@al20.inr.troitsk.ru
2 - Astro Space Center of Lebedev Physical Institute, Moscow, Profsoyuznaya 84/32, 117810, Russia
3 - Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119899, Russia
4 - Stockholm Observatory, S-133 36 Saltsjöbaden, Sweden

Received January 21; accepted June 25, 1999

Abstract:

We present preliminary results of an off-line search for non-triggered gamma-ray bursts (GRBs) in the BATSE daily records for about 5.7 years of observations. We found more GRB-like events than the yield of the similar search of [Kommers et al. (1998)] and extended the $\log\, N - \log\, P$ distribution down to $\rm \sim 0.1\, ph\, cm^{-2}\, s^{-1}$. The indication of a turnover of the $\log\, N - \log\, P$ at a small P is not confirmed: the distribution is straight at 1.5 decades with the power law index -.6 and cannot be fitted with a standard candle cosmological model.

Key words: gamma-ray bursts -- methods: data analysis

Copyright The European Southern Observatory (ESO)

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.