The Photometric System of Tsinghua-NAOC 80-cm Telescope at NAOC Xinglong Observatory
Fang Huang, Jun-Zheng Li, Xiao-Feng Wang, Ren-Cheng Shang, Tian-Meng, Zhang, Jing-Yao Hu, Yu-Lei Qiu, Xiao-Jun Jiang

TL;DR
This paper systematically evaluates the photometric performance of the Tsinghua-NAOC 80-cm Telescope at Xinglong Observatory, providing calibration, limiting magnitudes, and analysis of sky background changes over eight years.
Contribution
It offers a comprehensive calibration and performance analysis of the TNT telescope, including transformation relationships and long-term sky background assessment.
Findings
Accurate transformation between instrumental and standard magnitudes established.
Limiting magnitudes and photometric precision quantified.
Sky background at Xinglong Observatory has gradually worsened over years.
Abstract
Tsinghua-NAOC (National Astronomical Observatories of China) Telescope (hereafter, TNT) is an 80-cm Cassegrain reflecting telescope located at Xinglong bservatory of NAOC, with main scientific goals of monitoring various transients in the universe such as supernovae, gamma-ray bursts, novae, variable stars, and active galactic nuclei. We present in this paper a systematic test and analysis of the photometric performance of this telescope. Based on the calibration observations on twelve photometric nights, spanning the period from year 2004 to year 2012, we derived an accurate transformation relationship between the instrumental magnitudes and standard Johnson and Cousins magnitudes. In particular, the color terms and the extinction coefficients of different passbands are well determined. With these data, we also obtained the limiting magnitudes and the photometric…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
