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arXiv 1104.5102astro-ph.HE
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X射线/γ源AX J1910. 7 +0917和三个新发现的INTEGRAL源的研究

Study of the X-ray/gamma source AX J1910.7+0917 and three newly discovered INTEGRAL sources

L. Pavan, E. Bozzo, C. Ferrigno, C. Ricci, A. Manousakis, R. Walter, L. Stella

摘要:

AX J1910.7+0917是ASCA发现的一个尚未确认的源,最近由IBIS/ISGRI观察到,主要是因为它的光谱相当硬。我们分析了该来源的所有公开可用数据,并利用INTEGRAL数据分析软件的最新改进来充分利用IBIS/ISGRI数据。在从INTEGRAL、XMM-牛顿、钱德拉和ASCA收集的数据中,来源显然是可变的。该光谱可以模拟为吸收的幂律(NH~6x10^22 cm^-2,γ =1.5),在6.4 keV处有一条铁谱线。目前的数据仍然无法对放射源进行独特的分类。在AX J1910.7+0917周围的IBIS/ISGRI视场中,我们发现了三个新的源:IGR J19173+0747,IGR J19294+1327和IGR J19149+1036,后者与爱因斯坦源2 E 1912.5+1031位置重合。对于前两个来源,我们报告从Swift/XRT进行的后续观察中获得的结果。

英文摘要:

AX J1910.7+0917 is a still unidentified source discovered with ASCA and observed more recently with IBIS/ISGRI, mainly noticeable for its rather hard spectrum. We analyzed all the public available data on this source, and we took advantage of the recent improvements performed in the INTEGRAL data analysis software to fully exploit the IBIS/ISGRI data. In the data collected from INTEGRAL, XMM-Newton, Chandra and ASCA the source is clearly variable. The spectrum can be modelled as an absorbed powerlaw (NH~6x10^22 cm^-2, Gamma=1.5) with an iron line at 6.4 keV. The present data still do not allow for a unique classification of the source. In the IBIS/ISGRI field of view around AX J1910.7+0917, we discovered three new sources: IGR J19173+0747, IGR J19294+1327 and IGR J19149+1036, where the latter is positionally coincident with the Einstein source 2E 1912.5+1031. For the first two sources we report results obtained from follow-up observations carried out with Swift/XRT.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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