标题： 100 GeV以上的伽马射线的银河系源，由费米望远镜观测到 显示英文标题

标题： Galactic sources of E>100 GeV gamma-rays seen by Fermi telescope

摘要： 我们使用费米望远镜的数据，在低银道纬度 |b|<10 度区域搜索能量 E>100 GeV 的伽马射线源。为了将紧凑的伽马射线源与银河系的弥散辐射区分开，我们在内银河系（银道经度 |l|<60 度）使用 5 个事件的阈值，在外银河系使用 3 个事件的阈值。使用这种方法，我们识别出 22 个超高能（VHE）伽马射线簇，我们将它们视为“源候选”。22 个事件簇中有 3 个预计是由于弥散背景光子到达方向的随机巧合产生的。为了区分由真实源产生的 VHE 事件簇和背景，我们对每个源候选进行似然分析。我们列出 19 个高显著性源，这些源在能量范围 E>100 GeV 的似然分析中给出的测试统计量（TS）值高于 25。这 19 个高显著性源中只有 10 个可以轻易与已知的 VHE 伽马射线源对应。4 个源可能是已知 VHE 伽马射线源的扩展辐射的一部分。五个源是在 VHE 波段的新检测结果。在这些新检测结果中，我们暂时将一个源识别为可能的河外源 PMN J1603-4904（耀星候选体），另一个识别为 PSR J1828-1007 周围的脉冲星风星云。在与 eta Carinae 星云位置一致的源处也发现了高显著性 VHE 事件簇。在银河系中心区域，从 Sgr C 分子云中检测到了强烈的 VHE 伽马射线信号，但未从银河系中心本身检测到。 显示英文摘要

摘要： We perform a search for sources of gamma-rays with energies E>100 GeV at low Galactic latitudes |b|<10 deg using the data of Fermi telescope. To separate compact gamma-ray sources from the diffuse emission from the Galaxy, we use the Minimal Spanning Tree method with threshold of 5 events in inner Galaxy (Galactic longitude |l|<60 deg) and of 3 events in outer Galaxy. Using this method, we identify 22 clusters of very-high-energy (VHE) gamma-rays, which we consider as "source candidates". 3 out of 22 event clusters are expected to be produced in result of random coincidences of arrival directions of diffuse background photons. To distinguish clusters of VHE events produced by real sources from the background we perform likelihood analysis on each source candidate. We present a list of 19 higher significance sources for which the likelihood analysis in the energy band E>100 GeV gives Test Statistics (TS) values above 25. Only 10 out of the 19 high-significance sources can be readily identified with previously known VHE gamma-ray sources. 4 sources could be parts of extended emission from known VHE gamma-ray sources. Five sources are new detections in the VHE band. Among these new detections we tentatively identify one source as a possible extragalactic source PMN J1603-4904 (a blazar candidate), one as a pulsar wind nebula around PSR J1828-1007. High significance cluster of VHE events is also found at the position of a source coincident with the Eta Carinae nebula. In the Galactic Center region, strong VHE gamma-ray signal is detected from Sgr C molecular cloud, but not from the Galactic Center itself.