arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.0986astro-ph
收藏

Swift GRBS的精确早期位置：利用UVOT天体测量增强X射线位置

Accurate early positions for Swift GRBS: enhancing X-ray positions with UVOT astrometry

M. R. Goad, L. G. Tyler, A. P. Beardmore, P. A. Evans, S. R. Rosen, J. P. Osborne, R. L. C. Starling, F. E. Marshall, V. Yershov, D. N. Burrows, N. Gehrels, P. … 展开作者

M. R. Goad, L. G. Tyler, A. P. Beardmore, P. A. Evans, S. R. Rosen, J. P. Osborne, R. L. C. Starling, F. E. Marshall, V. Yershov, D. N. Burrows, N. Gehrels, P. Roming, A. Moretti, M. Capalbi, J. E. Hill, J. Kennea, S. Koch, D. Vanden Berk

备注：
12 pages, 8 figures, 1 table, submitted to Astronomy and Astrophysics, August 7th 2007
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

在这里，我们描述了一个自主的方式产生更准确的提示XRT的位置斯威夫特检测到的伽玛暴和余辉，UVOT天体测量和XRT和UVOT探测器之间的详细映射的基础上。后者大大减少了主要的系统误差-世界坐标系的恒星跟踪仪解。这种技术仅限于UVOT和XRT PC模式数据之间存在显著重叠的情况，在不到几个小时的时间尺度上，XRT精确位置的定位提高了2倍。此外，对于大多数爆发，所实现的准确度优于早期（长达24小时）的天体测量校正的XRT PC模式图像，并且与基于后期深度XRT PC模式成像的天体测量校正的X射线位置所实现的准确度相当（删节）。

英文摘要：

Here we describe an autonomous way of producing more accurate prompt XRT positions for Swift-detected GRBs and their afterglows, based on UVOT astrometry and a detailed mapping between the XRT and UVOT detectors. The latter significantly reduces the dominant systematic error -- the star-tracker solution to the World Coordinate System. This technique, which is limited to times when there is significant overlap between UVOT and XRT PC-mode data, provides a factor of 2 improvement in the localisation of XRT refined positions on timescales of less than a few hours. Furthermore, the accuracy achieved is superior to astrometrically corrected XRT PC mode images at early times (for up to 24 hours), for the majority of bursts, and is comparable to the accuracy achieved by astrometrically corrected X-ray positions based on deep XRT PC-mode imaging at later times (abridged).

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑