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 Gamma =~ 1.7 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 7*E-6 erg cm-2 (20-200 keV). 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).

Observation of GRB 030131 with the INTEGRAL satellite

FRONTERA, Filippo;
2003

Abstract

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 Gamma =~ 1.7 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 7*E-6 erg cm-2 (20-200 keV). 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).
2003
Gotz, D.; Mereghetti, S.; Hurley, K.; Deluit, S.; Feroci, M.; Frontera, Filippo; F., Fruchter; A., Gorosabel; J., Hartmann; D. H., Hjorth
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1202265
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