Vol 14, No 6

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

Shao-Ming Hu, Sheng-Hao Han, Di-Fu Guo, Jun-Ju Du

Abstract

Abstract The one-meter telescope at Weihai Observatory WHO of Shandong University is an f/8 Cassegrain telescope. Three sets of filters are installed in a dual layer filterwheel that use Johnson–Cousins UBVRI, Sloan Digital Sky Survey u'g'r'i'z' and Stömgren uvby. The photometric system and the CCD camera are introduced, 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 parameters describing the site’s astroclimate are systematically studied, including typical seeing, statistics on the number of clear nights and average sky brightness, based on data gathered from Sep. 2007 to Aug. 2013, are reported in this work. Photometric calibrations were done using Landolt standard star observations spanning eight nights, which yielded transformation coefficients, photometric precision and system throughput. The limiting magnitudes are simulated using the derived calibration parameters and classic observation conditions at WHO.

Keywords

Keywords telescopes — site testing — instrumentation: miscellaneous — techniques: photometric

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