Volume 409, Number 3, October III 2003
|Page(s)||831 - 834|
|Section||Cosmology (including clusters of galaxies)|
|Published online||17 November 2003|
Observation of GRB 030131 with the INTEGRAL satellite *
Istituto di Astrofisica Spaziale e Fisica Cosmica – CNR, Sezione di Milano “G. Occhialini”, Via Bassini 15, 20133 Milano, Italy
2 Dipartimento di Fisica, Università degli Studi di Milano Bicocca, P.zza della Scienza 3, 20126 Milano, Italy
3 UC Berkeley Space Sciences Laboratory, Berkeley CA 94720-7450, USA
4 Integral Science Data Centre, Chemin d'Écogia 16, 1290 Versoix, Switzerland
5 Istituto di Astrofisica Spaziale e Fisica Cosmica – CNR, via Fosso del Cavaliere 100, 00133 Roma, Italy
6 Dipartimento di Fisica, Università di Ferrara, Via Paradiso 12, 44100 Ferrara, Italy
7 Istituto di Astrofisica Spaziale e Fisica Cosmica – CNR, Sezione di Bologna, via Piero Gobetti 101, 40129 Bologna, Italy
8 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
9 Instituto de Astrofísica de Andalucía (IAA-CSIC), PO Box 03004, 18080 Granada, Spain
10 Department of Physics and Astronomy, Clemson University, Clemson, SC 29634-0978, USA
11 Astronomical Observatory, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
12 Astronomical Institute, Academy of Sciences of the Czech Republic, 251 65 Ondrejov, Czech Republic
13 Service d'Astrophysique, CEA/Saclay, Orme des Merisiers, Bât. 709, 91191 Gif-sur-Yvette, France
14 Instituto de Astronomia y Fisica del Espacio / CONICET, cc67, suc 28. 1428 Buenos Aires, Argentina
15 Osservatorio Astronomico di Trieste, Via GB Tiepolo 11, 34131 Trieste, Italy
16 ESA-ESTEC, RSSD, Keplerlaan 1, 2201 AZ Nordwijk, The Netherlands
Corresponding author: D. Götz, firstname.lastname@example.org
Accepted: 23 July 2003
A long Gamma-Ray Burst (GRB) was detected with the instruments on board the INTEGRAL satellite on January 31 2003. Although most of the GRB, which lasted ~150 s, occurred during a satellite slew, the automatic software of the INTEGRAL Burst Alert System was able to detect it in near-real time. Here we report the results obtained with the IBIS instrument, which detected GRB 030131 in the 15 keV–200 keV energy range, and ESO/VLT observations of its optical transient. The burst displays a complex time profile with numerous peaks. The peak spectrum can be described by a single power law with photon index and has a flux of ~2 photons cm-2 s-1 in the 20–200 keV energy band. The high sensitivity of IBIS has made it possible for the first time to perform detailed time-resolved spectroscopy of a GRB with a fluence of erg cm-2 (20–200 keV).
Key words: gamma rays: bursts / gamma rays: observations
Based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia and the USA, and on observations collected by the Gamma-Ray Burst Collaboration at ESO (GRACE) at the European Sourthern Observatory, Paranal, Chile (Programme 70.D-0523).
© ESO, 2003
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