通过光谱学研究50个Palermo Swift-BAT硬X射线天体的性质
The nature of fifty Palermo Swift-BAT hard X-ray objects through optical spectroscopy
摘要：
我们提出了50个硬X射线发射物体的性质，通过在北半球和南半球的七个望远镜进行的光谱学活动公布。这些物体是用Swift-BAT探测到的，并被列入巴勒莫BAT 54个月目录中的不明性质。详细地说，我们的样本中有45个源被确定为活动星系核，其中27个被归类为1型（具有宽和窄发射线），18个被归类为2型（只有窄发射线）。在宽线发射天体中，一个是1型高红移类恒星天体，而在窄线发射天体中，一个是星暴星系，一个是X射线明亮的光学正常星系，一个是低电离核发射线区。我们报告了30个新的红移测量值，13个确认值和2个更精确的红移值。剩下的五个天体是星系源：三个是激变变星，一个是X射线双星，可能有一颗低质量的次级恒星，还有一颗是活动恒星。
英文摘要：
We present the nature of 50 hard X-ray emitting objects unveiled through an optical spectroscopy campaign performed at seven telescopes in the northern and southern hemispheres. These objects were detected with Swift-BAT and listed as of unidentified nature in the 54-month Palermo BAT catalogue. In detail, 45 sources in our sample are identified as active galactic nuclei of which, 27 are classified as type 1 (with broad and narrow emission lines) and 18 are classified as type 2 (with only narrow emission lines). Among the broad-line emission objects, one is a type 1 high-redshift quasi-stellar object, and among the narrow-line emission objects, one is a starburst galaxy, one is a X-ray bright optically normal galaxy, and one is a low ionization nuclear emission line region. We report 30 new redshift measurements, 13 confirmations and 2 more accurate redshift values. The remaining five objects are galactic sources: three are Cataclismic Variables, one is a X-ray Binary probably with a low mass secondary star, and one is an active star.
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