Hard X-Ray Emission of the Microquasar GRO J1655–40 during the Rise of Its 2005 Outburst
Hard X-Ray Emission of the Microquasar GRO J1655–40 during the Rise of Its 2005 Outburst
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DOI：
10.1086/533512
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
A. Joinet;E. Kalemci;F. Senziani;F. Senziani;F. Senziani
中科院分区：
文献类型：
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作者：
A. Joinet;E. Kalemci;F. Senziani;F. Senziani;F. Senziani
我们提出了银河系黑洞GRO J1655-40在其2005年爆发开始的高能量发射的分析。沿着现有的同步RXTE和Swift数据，分析了分布在4周内的458 k INTEGRAL观测数据。高能量的数据使我们能够检测到一个高能量截止的存在，并研究其演变过程中的爆发上升。这种高能量的功能通常与康普顿化模型的框架中的热机制，我们可以估计等离子体参数。我们发现电子温度约为30-40 keV，光学深度约为1.8-2.1。高能截止沿着射电流量的减小，并随着喷流的关闭而消失。
We present an analysis of the high-energy emission of the Galactic black hole GRO J1655–40 at the beginning of its 2005 outburst. The data from 458 ks of INTEGRAL observations, spread over 4 weeks, are analyzed, along with the existing simultaneous RXTE and Swift data. The high-energy data allow us to detect the presence of a high-energy cutoff and to study its evolution during the outburst rise. This high-energy feature is generally related to thermal mechanisms in the framework of Comptonization models from which we can estimate the plasma parameters. We found an electron temperature of about 30-40 keV and an optical depth of around 1.8-2.1. The high-energy cutoff decreased along with the radio flux and disappeared as the jet turned off.