摘要
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 UBV RI 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 UBV RI 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.
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 UBV RI 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 UBV RI 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.
基金
support from the staff at the Xinglong 85-cm telescope
support from the National Natural Science Foundation of China(NSFC)through grant 11673003
the National Basic Research Program of China(973 program,2014CB845700)
partially supported by the Open Project Program of the Key Laboratory of Optical Astronomy(National Astronomical Observatories)
NSFC under Grant Nos.11403088 and 11273051(Xinjiang Astronomical Observatory)
Chinese Academy of Sciences and Department of Astronomy,Beijing Normal University
