标题： INTEGRAL/IBIS点源定位精度的新测定 显示英文标题

标题： A new determination of the INTEGRAL/IBIS point source location accuracy

摘要： 目标：根据存档飞行数据的分析，确定INTEGRAL/IBIS望远镜的点源定位精度（PSLA）。方法：使用最新离线科学分析软件版本7.0，对超过40000个单独的点源（科学窗口）的INTEGRAL/IBIS数据进行了分析。然后将重建的源位置与最准确的位置进行比较，这些位置由聚焦X射线望远镜确定。由于PSLA是源检测显著性的强函数，因此将真实位置的偏移量按显著性进行直方图统计，以便确定90%置信限。这已经针对完全编码视场（FCFOV）和部分编码视场（PCFOV）中的源进行了处理。结果：发现PSLA自早期任务数据和软件以来有了显著改善，适用于FCFOV和PCFOV。结论：这一结果对执行IBIS源后续程序的观测者具有重要意义，因为在某些情况下，需要搜索的天空区域减少了超过50%。 显示英文摘要

摘要： AIMS: To determine the Point Source Location Accuracy (PSLA) for the INTEGRAL/IBIS telescope based on analysis of archival in-flight data. METHODS: Over 40000 individual pointings (science windows) of INTEGRAL/IBIS data were analysed using the latest Off-line Science Analysis software, version 7.0. Reconstructed source positions were then compared against the most accurate positions available, determined from focusing X-ray telescopes. Since the PSLA is a strong function of source detection significance, the offsets from true position were histogrammed against significance, so that the 90% confidence limits could be determined. This has been done for both sources in the fully coded field of view (FCFOV) and partially coded field of view (PCFOV). RESULTS: The PSLA is found to have improved significantly since values derived from early mission data and software for both FCFOV and PCFOV. CONCLUSIONS: This result has implications for observers executing follow-up programs on IBIS sources since the sky area to be searched is reduced by >50% in some cases.