标题： 确定ASCA银河系中心巡天中的微弱X射线源的性质 显示英文标题

标题： Determining the Nature of Faint X-Ray Sources from the ASCA Galactic Center Survey

摘要： 我们给出了ASCA银河系中心和银道面巡天中六个目标的认证结果：AXJ173548-3207、AXJ173628-3141、AXJ1739.5-2910、AXJ1740.4-2856、AXJ1740.5-2937、AXJ1743.9-2846。利用钱德拉、XMM-Newton 和 XRT/Swift 的X射线数据改进了这些源的光学对应体的位置。随后，我们在RTT-150望远镜上对这些确定的光学对应体进行了系列光谱观测。基于光学和红外目录对X射线和光学光谱以及宽波段测光测量的分析，确定了计划中源的性质。在AXJ173628-3141误差圈内检测到两个X射线目标：一个是具有高活跃日冕的G型星，另一个可能是半合星，即伴有吸积白矮星的红巨星。三个源（AXJ1739.5-2910、AXJ1740.5-2937、AXJ1743.9-2846）被发现是活动的G-K型星，推测为RS CVn型星；一个（AXJ1740.4-2856）是M型矮星，另一个（AXJ173548-3207）可能处于低状态的低质量X射线双星。估计了这些源在软X射线波段的距离和相应的光度；深入分析INTEGRAL银河系中心观测数据后，未发现其中任何一个源在高于20keV的能量上有统计显著的流量。 显示英文摘要

摘要： We present the results of the identification of six objects from the ASCA Galactic center and Galactic plane surveys: AXJ173548-3207, AXJ173628-3141, AXJ1739.5-2910, AXJ1740.4-2856, AXJ1740.5-2937, AXJ1743.9-2846. Chandra, XMM-Newton, and XRT/Swift X-ray data have been used to improve the positions of the optical counterparts to these sources. Thereafter, we have carried out a series of spectroscopic observations of the established optical counterparts at the RTT-150 telescope. Analysis of X-ray and optical spectra as well as photometric measurements in a wide wavelength range based on optical and infrared catalogs has allowed the nature of the program sources to be determined. Two X-ray objects have been detected in the error circle of AXJ173628-3141: one is a coronally active G star and the other may be a symbiotic star, a red giant with an accreting white dwarf. Three sources (AXJ1739.5-2910, AXJ1740.5-2937, AXJ1743.9-2846) have turned out to be active G-K stars, presumably RS CVn objects, one (AXJ1740.4-2856) is an M dwarf, and another one (AXJ173548-3207) may be a low-mass X-ray binary in its low state. The distances and corresponding luminosities of the sources in the soft X-ray band have been estimated; analysis of deep INTEGRAL Galactic Center observations has not revealed a statistically significant flux at energies higher 20 keV from any of them.