The photometric system of the One-meter Telescope at Weihai Observatory of Shandong University

Abstract

The one-meter telescope at Weihai Observatory of Shandong University is an\nf/8 Cassegrain telescope. Three sets of filters, including Johnson--Cousins\nUBVRI, Sloan Digital Sky Survey u$'$g$'$r$'$i$'$z$'$ and Str\\"{o}mgren uvby,\nare installed in a dual layer filterwheel. The photometric system and the CCD\ncamera are introduced in this paper, followed by detailed analysis of their\nperformances, and determination of the relevant parameters, including gain,\nreadout noise, dark current and linearity of the CCD camera. In addition, the\ncharacteristics of the site astro-climate condition, including typical seeing,\nclear nights statistics, and average sky brightness were studied systematically\nbased on data gathered from Sep. 2007 to Aug. 2013, and were reported in this\nwork. Photometric calibrations were done using 8 nights Landolt standard star\nobservations, which yielded transformation coefficients, photometry precision\nand system throughput. The limiting magnitudes were simulated using the derived\ncalibration parameters and classic observation conditions at WHO.\n