Vol 18, No 9 (2018) / Bai

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Upgraded photometric system on the 85-cm telescope at Xinglong station

Chun-Hai Bai, Jian-Ning Fu, Tao-Ran Li, Zhou Fan, Jiang-Hua Wu, Yong Zhao, Xian-Qun Zeng, Wen-Zhao Zhang, Peng Qiu, Guo-Jie Feng, Xiao-Jun Jiang

Abstract

The 85-cm telescope at Xinglong station is a prime focus system that operates well with high science outputs. The telescope has been upgraded since 2014 with a new corrector, and new filters and camera, which are provided by Beijing Normal University. The filter set is the Johnson-Cousins UBVRI system. We report the test results of the new system including bias, dark current, linearity, gain and readout noise of the CCD camera. Then we derive accurate instrumental calibration coefficients in UBVRI bands with Landolt standard stars during photometric nights. Finally, we give the limiting magnitudes with various exposure times and signal-to-noise ratios for observers as references.

Keywords


telescope — instrumentation — CCD photometry

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DOI: https://doi.org/10.1088/1674–4527/18/9/107

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