标题： 探测和分析一个新的INTEGRAL硬X射线瞬变源IGR J17285-2922 显示英文标题

标题： Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922

摘要： 我们展示了INTEGRAL源IGR J17285-2922的瞬时特性，该源是在2003年9月IBIS/ISGRI银河系中心深度曝光期间的一次活跃期中识别出来的。该源在20至100千电子伏能量范围内的最大探测显著性为14西格玛，并表现出6.5毫蟹的流量，在离开ISGRI视场之前可见。该源至少在150千电子伏以下可见，其光谱可以用幂律斜率Γ=2.1±0.17来拟合；由于统计较差，无法拟合更物理的模型。检测到的特征与该源是包含黑洞或中子星的银河系低质量X射线双星一致。 显示英文摘要

摘要： We present the transient nature of INTEGRAL source IGR J17285-2922, identified from a single period of activity during an IBIS/ISGRI Galactic Centre Deep Exposure in September 2003. The source has a maximum detection significance of 14 sigma in the 20-100 keV energy range and exhibits a flux of 6.5 mCrab before it moves out of the ISGRI field of view. The source is visible to at least 150 keV and its spectrum can be fit with a power law slope of Gamma=2.1+/-0.17; a more physical model could not be fit due to poor statistics. Detected characteristics are consistent with the source being a Galactic low-mass X-ray binary harbouring a black hole or neutron star.