The flaring activity of Sagittarius A* (Sgr A*) can be analyzed by statistical means to test emission models for its accretion flow. A particular modeling question is whether the observed X-ray flares are the high-energy end of a synchrotron spectrum or if they arise from self-Comptonized photons of a lower-energy synchrotron process. We use already published Chandra X-ray Visionary Project data to statistically investigate the X-ray count-rate distribution of Sgr A*. Two previous workgroups have already undertaken such an analysis on that data. They modeled the flaring part of the emission with a bounded power law, i.e., a power-law distribution with a hard cutoff at the highest measured count rate. With this model, both teams obtain a power-law index ##IMG## [http://ej.iop.org/images/0004-637X/898/2/138/apjab9947ieqn1.gif] {${\alpha }_{X}\sim 2$} . We show that the flare count-rate distribution can also be well described by a truncated, i.e., an exponenti...

中文翻译：

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来自NIR和X射线耀斑统计数据的Sgr A *中的同步加速器自康普顿散射

射手座A *（Sgr A *）的喇叭口活动可以通过统计手段进行分析，以测试其增生流量的排放模型。一个特殊的建模问题是观察到的X射线耀斑是否是同步加速器谱的高能端，或者它们是否来自低能量同步加速器过程的自补偿光子。我们使用已经发布的Chandra X射线远景项目数据对Sgr A *的X射线计数率分布进行统计调查。前两个工作组已经对该数据进行了这样的分析。他们用有限的幂定律（即具有最高测量计数率的硬截止的幂定律分布）对发射的扩口部分进行建模。使用此模型，两个团队都获得了幂律索引## IMG ## [http://ej.iop.org/images/0004-637X/898/2/138/apjab9947ieqn1。gif] {$ {\ alpha} _ {X} \ sim 2 $}。我们证明了耀斑计数率分布也可以用截断即指数形式来很好地描述。