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Astrometric Surveys in Support of Large Telescopes

机译:支持大型望远镜的占星测量

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摘要

The current status and future developments of highly accurate, dense, astrometric surveys on the International Celestial Reference System (ICRS) are discussed. The U.S. Naval Observatory CCD Astrograph Catalog (UCAC) project is an ongoing observational program aiming at a global sky coverage with 20 to 70 mas positional accuracy for the magnitude range between 10 to 16. This program extends the reference star density by a factor of about 30 over the Tycho-2 catalog, with about 10 times higher positional accuracy than the GSC I. The second UCAC release (end of 2002) gives positions and proper motions for stars between ―90 and about +40 degrees declination. The first release and unpublished updates have been supporting the Sloan Digital Sky Survey, 2MASS, the minor planet community, SOAR and others. The next step, a 1-meter class, dedicated, robotic, wide-field, astrometric instrument is already designed (10k by 10k single CCD) and a global sky catalog to 20th magnitude could be observed in only 2 years with positions accurate to 10 mas in the magnitude range between 15 to 18.
机译:讨论了国际天文参考系统(ICRS)上高度准确,密集,天文测量的现状和未来发展。美国海军天文台CCD天文仪目录(UCAC)项目正在进行中,目的是在20至70 mas的位置精度范围在10到16之间的范围内,对全球天空进行覆盖。该程序将参考恒星密度扩展了大约1倍。在Tycho-2目录中,它的位置精度比GSC I高出30倍,大约是GSC I的10倍。第二次UCAC发布(2002年底)给出了恒星在90度到+40度左右偏角之间的位置和适当的运动。第一版和未发布的更新一直在支持Sloan数字天空调查,2MASS,小行星社区,SOAR等。下一步,已经设计了一种1米级,专用的,自动的,宽视场的天文仪器(10k x 10k单个CCD),并且仅在2年内就可以观测到20级的全球天空目录,位置精确到10 mas的大小范围在15到18之间。

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