Grebenev 2007 INTEGRAL 对 GRB 060428C的观测
主要内容:
此暴没有被INTEGRAL Burst Alert System (IBAS)发现，而是被IBIS/ISGRI and SPI telescopes看到，所以当时并没有触发其他望远镜跟进观测，而是从档案里找到的一个暴。这个暴duration 12秒，E_p 95keV。有prompt阶段和早期余辉阶段的数据。
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文章信息:
Cosmic gamma-ray burst 060428C detected in the fields of view of the IBIS and SPI telescopes of the INTEGRAL observatory and its early afterglow
(Submitted on 2 Oct 2007)
Abstract: Analyzing archival data of the INTEGRAL observatory we discovered and localized a cosmic gamma-ray burst detected within fields of view of the IBIS/ISGRI and SPI telescopes on April 28, 2006. The burst has not been revealed by the INTEGRAL Burst Alert System (IBAS), so the information on its coordinates has not been distributed in time and search for the afterglow has not been carried out. The burst has been also detected by the KONUS/WIND and RHESSI spacecrafts. Its fluence was 2.3x10^{-6} erg/cm^2 in the 20-200 keV energy band, the maximum flux was 3.6x10^{-7} erg/cm^2/s (3.9 phot/cm^2/s). The burst had a complicated multi-peak profile and was outstanding of the typical bursts by increasing its spectral hardness with time. The emission spectrum near the flux maximum was characterized by the photon index alpha ~ -1.5 and the peak energy Ep ~ 95 keV. The burst lasted ~12 s, then we observed its afterglow at energies 15-45 keV decaying according to a power law with the index ~ -4.5. The spectral hardness decreased substantially during the afterglow.
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