The Simultaneous Three-channel Multicolor CCD Photometric System of the 1.2 m Telescope at Jilin Astronomical Observatory

• Published in: Research in astronomy and astrophysics 2022-05, Vol.22 (5), p.55009
• Main Authors: Niu, Bing-Li, Liu, Cheng-Zhi, Li, Zhen-Wei, Kang, Zhe, Lv, You
• Format: Article
• Language: English
• Subjects: Afterglows; Asteroids; Celestial bodies; Field of view; Gamma ray bursts; Gamma rays; Observatories; Performance evaluation; Photometers; Photometry; Sky surveys (astronomy); Space debris; Telescopes
• ISSN: 1674-4527
• DOI: 10.1088/1674-4527/ac5afc

We will introduce the construction and design of a new simultaneous three-channel multicolor CCD photometer. This photometer has been mounted on the 1.2 m telescope at Jilin Astronomical Observatory, and is applied to study space debris, gamma-ray burst afterglows, asteroids and other rapidly variable objects. As one of the ground follow-up telescopes of the Chinese-French Space-based multi-band astronomical Variable Objects Monitor (SVOM) mission, it appears very essential to evaluate the performance of the photometry system of this photometer, which can achieve simultaneous imaging within a field of view of 21.′5 × 21.′5, 21.′5 × 21.′5 and 21.′3 × 21.′3 in the Sloan Digital Sky Survey (SDSS) g ′, r ′, i ′ bands, respectively. Photometric calibrations were carried out by using plenty of SDSS standard stars, and the relationship between the photometric system and the Johnson-Bessel filter system was also studied. The results of the performance evaluation from observing open cluster M67 are presented.