The Thirty Millimeter Telescope
Yoshifusa Ita (1), Takashi Ichikawa (1), Hironori Tsutsui (2), Takumi, Hanaue (1), Takahiro Komiyama (1), Hiroki Onozato (3,1), Atsushi Iwamatsu, (1), Ryosuke Morita (1), Yuta Habasaki (1), Ryuto Amemiya (1), Miho Hanawa, (1), Kenshi Yanagisawa (3,2), Hideyuki Izumiura (2)

TL;DR
This paper introduces the Thirty Millimeter Telescope, a near-infrared instrument designed for precise photometry of bright stars and monitoring variability along the northern Galactic plane, with demonstrated accuracy and operational performance.
Contribution
It details the design, calibration, and performance of a new small-aperture near-infrared telescope for bright star observation and variability monitoring.
Findings
Photometry uncertainty less than 5% for stars brighter than 7-6 mag
Repeatability of measurements better than 1% for bright stars
Capability to monitor bright variable stars in the northern Galactic plane
Abstract
A near-infrared telescope with an effective aperture diameter of thirty millimeters has been developed. The primary objective of the development is to observe northern bright stars in the , , and bands and provide accurate photometric data on those stars. The second objective is to repeatedly observe a belt-like region along the northern Galactic plane ( and ) to monitor bright variable stars there. The telescope has been in use since December 2016. The purpose of this paper is to describe the design and operational performances of the telescope, photometric calibration methods, and our scientific goals. We show that the telescope has the ability to provide photometry with an uncertainty of less than 5\% for stars brighter than 7, 6.5, and 6~mag in the , , and bands, respectively. The repeatability of the…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Adaptive optics and wavefront sensing
