Issue |
A&A
Volume 438, Number 3, August II 2005
|
|
---|---|---|
Page(s) | 1175 - 1183 | |
Section | Catalogs and data | |
DOI | https://doi.org/10.1051/0004-6361:20053159 | |
Published online | 18 July 2005 |
The 1st INTEGRAL SPI-ACS gamma-ray burst catalogue
1
Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany e-mail: arau@mpe.mpg.de
2
UC Berkeley Space Sciences Laboratory, Berkeley, CA 94720-7450, USA
Received:
30
March
2005
Accepted:
15
April
2005
We present the sample of gamma-ray bursts detected with the
anti-coincidence shield ACS of the spectrometer SPI on-board
INTEGRAL for the first 26.5 months of mission operation (up to Jan.
2005). SPI-ACS works as a nearly omnidirectional gamma-ray burst
detector above ~80 keV but lacks spatial and spectral
information. In this catalogue, the properties derived from the
50 ms light curves (e.g., T90, , Cint,
variability,
) are given for each candidate burst in the
sample. A strong excess of very short events with durations
<0.25 s is found. This population is shown to be significantly
different from the short- and long-duration burst sample by means of
the intensity distribution and
test and is certainly
connected with cosmic ray hits in the detector. A rate of 0.3 true
gamma-ray bursts per day is observed.
Key words: gamma rays: bursts / catalogs / instrumentation: detectors
© ESO, 2005
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