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arXiv 0712.1005astro-ph
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对性质不明的INTEGRAL源的快速跟踪观测

Swift Follow-up Observations of INTEGRAL Sources of Unknown Nature

J. Rodriguez, J. A. Tomsick, S. Chaty

备注：
7 pages, 2 figures, accepted for publication in A&A. Several changes since version 1 including referee's comments. Significant modifications in the case of IGR J18559+1535
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摘要：

我们利用\swift天文台上的X射线望远镜进行X射线观测，将12个INTEGRAL源的X射线位置精确到3-5”，以便进一步确定它们在光学、红外和无线电波长上的对应物，试图揭示它们的真实性质。然后，我们搜索了在线目录（例如NED，SIMBAD，2 MASS，2 MASX和NVSS），以搜索其他波长的对应物。对于所有的来源，我们给出了一个完善的X射线的位置，提供X射线光谱参数，确定红外对应物，并给出在光学和紫外线波长与UVOT观测时的幅度。我们确认了先前怀疑为活动星系核的6个源（IGR J 02343 +3229，J13149+4422，J14579-4308，J16385-2057，J18559+1535，J19378-0617）的性质。我们的分析首先使我们认为IGR J 09523 -6231和IGR J10147-6354是活动星系核。虽然前者最近已被证实为Seyfert 1.5 AGN，但我们认为后者是Seyfert 2。所有其他来源可能是银河系来源，在这种情况下，它们的光谱形状可能表明它们是X射线双星。在一个例子中（IGR J19308+0530），银河系的性质通过确认一颗F8恒星作为对应物而得到证实。我们赞成到源的距离不大于1千秒差距。源很可能是一颗中子星XRB或CV。我们还报告发现了六个未知性质的偶然来源。

英文摘要：

(Abridged) We made use of X-ray observations with the X-ray telescope on-board the \swift observatory to refine the X-ray position to 3-5" accuracy of 12 INTEGRAL sources, so as to further identify their counterpart at optical, infrared, and radio wavelengths, to try to unveil their true nature. We then searched the online catalogues (e.g. NED, SIMBAD, 2MASS, 2MASX, and NVSS) to search for counterparts at other wavelengths. For all sources, we give a refined X-ray position, provide X-ray spectral parameters, identify infrared counterparts, and give magnitudes at optical and ultra violet wavelengths seen with UVOT when observations are available. We confirm the nature of six sources formerly suspected to be AGN (IGR J02343+3229, J13149+4422, J14579-4308, J16385-2057, J18559+1535, J19378-0617). Our analysis first leads us to suggest that IGR J09523-6231 and IGR J10147-6354 are AGN. While the former has recently been confirmed as a Seyfert 1.5 AGN, we suggest the latter is a Seyfert 2. All other sources may be Galactic sources, in which case their spectral shape may suggest that they are X-ray binaries. In one case (IGR J19308+0530), the Galactic nature is confirmed through the identification of an F8 star as the counterpart. We favour a distance to the source not greater than 1 kpc. The source is likely to be a neutron star XRB or a CV. We also report the discovery of six serendipitous sources of unknown nature.

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