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题名: The Representation of OTA Images' Astrometric Results with WCS-SIP Coefficients
作者: Ping Yiding; Zhang Chen; Lu Chunlin
刊名: Acta Astronomica Sinica
出版日期: 2017
卷号: 58, 期号:3, 页码:25-1-25-10
英文摘要: Cross-matching the sources extracted from observed images with reference catalogs or earlier records is a necessary procedure for seeking the variation of sources in terms of position or brightness for the Optical Telescopes Array (OTA) survey. Knowing the celestial positions of these objects on images is prerequisite therefore. A method based on matrix manipulation is applied to transform the existing calculated plate constants of OTA images into World Coordinate System (WCS) coefficients and Simple Imaging Polynomial (SIP) coefficients, which map image positions into celestial positions so as to facilitate the mining of the FITS (Flexible Image Transport System) images of OTA. An improvement of OTA's astrometry coming with this method, as well as the discussion about some problems of OTA's astrometry are also presented.
语种: 英语
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/17363
Appears in Collections:空间目标与碎片观测研究基地_期刊论文

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