为空间干涉测量任务和其他未来天体参考系选择的光学明亮类星体的光度观测
Photometric observations of selected, optically bright quasars for Space Interferometry Mission and other future celestial reference frames
摘要：
本文介绍了对235个河外天体的光度观测，这些天体是空间干涉测量任务的潜在目标。使用Cerro Tololo美洲天文台和海军天文台Flagstaff站的1米望远镜，在2005年至2007年期间获得了1 - 4个历元的5%水平的平均B，V，R，I等。在Veron & Veron-Cetty星表中有V星等的134个源中，约有36%的共同源的星等差大于1.0等，有10个星等差大于3等。我们在这里提出的第一组观测形成了选定的参考系源的长期光度变化研究的基础，以协助飞行任务目标的选择，并支持一般的类星体多色光度变化研究。
英文摘要：
Photometric observations of 235 extragalactic objects that are potential targets for the Space Interferometry Mission (SIM) are presented. Mean B, V, R, I magnitudes at the 5% level are obtained at 1 - 4 epochs between 2005 and 2007 using the 1-m telescopes at Cerro Tololo Inter-American Observatory and Naval Observatory Flagstaff Station. Of the 134 sources which have V magnitudes in the Veron & Veron-Cetty catalog a difference of over 1.0 mag is found for the observed-catalog magnitudes for about 36% of the common sources, and 10 sources show over 3 mag difference. Our first set of observations presented here form the basis of a long-term photometric variability study of the selected reference frame sources to assist in mission target selection and to support in general QSO multi-color photometric variability studies.
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。
