GRB 021219 : the first Gamma - Ray Burst localized in real time with IBAS ⋆
نویسندگان
چکیده
the date of receipt and acceptance should be inserted later Abstract. On December 19, 2002, during the Performance and Verification Phase of INTEGRAL, a Gamma-Ray Burst (GRB) has been detected and localized in real time with the INTEGRAL Burst Alert System (IBAS). Here we present the results obtained with the IBIS and SPI instruments. The burst had a time profile with a single peak lasting about 6 s. The peak spectrum can be described by a single power law with photon index Γ=1.6±0.1 and flux ∼3.7 photons cm −2 s −1 (20-200 keV). The fluence in the same energy range is 9×10 −7 erg cm −2. Time resolved spectroscopy performed with IBIS/ISGRI shows a clear hard to soft evolution of the spectrum.
منابع مشابه
The INTEGRAL⋆ Burst Alert System
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The INTEGRAL Burst Alert System (IBAS) is the software for real time detection of Gamma Ray Bursts (GRBs) and the rapid distribution of their coordinates. IBAS has been running almost continuously at the INTEGRAL Science Data Center since the beginning of the INTEGRAL mission, yielding up to now accurate localizations for 10 GRBs detected in the IBIS field of view. IBAS is able to provide error...
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