山东大学威海天文台一米望远镜测光系统
The photometric system of the One-meter Telescope at Weihai Observatory of Shandong University
摘要：
山东大学威海天文台的一米望远镜是f/8卡塞格伦望远镜。三套滤光片，包括Johnson--UBVRI、Sloan Digital Sky Survey u $'$ g $'$ r $'$ i $'$ z $'$和Strömgren uvby，安装在双层滤光轮中。介绍了测光系统和CCD相机，详细分析了它们的性能，并确定了相关参数，包括CCD相机的增益、读出噪声、暗电流和线性度。此外，根据2007年9月至2013年8月收集的数据，系统地研究了该站点的天文气候条件特征，包括典型视宁度、晴朗夜晚统计和平均天空亮度，并在本工作中报告。利用8个夜晚的Landolt标准星观测数据进行了光度定标，得到了转换系数、光度精度和系统吞吐量。使用导出的校准参数和世界卫生组织的经典观测条件模拟了极限星等。
英文摘要：
The one-meter telescope at Weihai Observatory of Shandong University is an f/8 Cassegrain telescope. Three sets of filters, including Johnson--Cousins UBVRI, Sloan Digital Sky Survey u$'$g$'$r$'$i$'$z$'$ and Strömgren uvby, are installed in a dual layer filterwheel. The photometric system and the CCD camera are introduced in this paper, followed by detailed analysis of their performances, and determination of the relevant parameters, including gain, readout noise, dark current and linearity of the CCD camera. In addition, the characteristics of the site astro-climate condition, including typical seeing, clear nights statistics, and average sky brightness were studied systematically based on data gathered from Sep. 2007 to Aug. 2013, and were reported in this work. Photometric calibrations were done using 8 nights Landolt standard star observations, which yielded transformation coefficients, photometry precision and system throughput. The limiting magnitudes were simulated using the derived calibration parameters and classic observation conditions at WHO.
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