MuSCAT2: four-color simultaneous camera for the 1.52-m Telescopio Carlos Sánchez

Narita, N.; Fukui, Akihiko; Kusakabe, Nobuhiko; Watanabe, Noriharu; Palle, Enric; Parviainen, H.; Montañés-Rodríguez, P.; Murgas, F.; Monelli, M.; Aguiar, M.; Perez Prieto, J. A.; Oscoz, Á.; de Leon, Jerome; Mori, Mayuko; Tamura, Motohide; Yamamuro, Tomoyasu; Béjar, V. J. S.; Crouzet, N.; Hidalgo, D.; Klagyivik, P.; Luque, R.; Nishiumi, T.
Bibliographical reference

Journal of Astronomical Telescopes, Instruments, and Systems, Volume 5, id. 015001 (2019).

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We report the development of a four-color simultaneous camera for the 1.52-m Telescopio Carlos Sánchez in the Teide Observatory, Canaries, Spain. The instrument, named MuSCAT2, has a capability of four-color simultaneous imaging in g (400 to 550 nm), r (550 to 700 nm), i (700 to 820 nm), and zs (820 to 920 nm) bands. MuSCAT2 equips four 1024 × 1024 pixel CCDs, having a field of view of 7.4 × 7.4 arc min2 with a pixel scale of 0.44 arc sec per pixel. The principal purpose of MuSCAT2 is to perform high-precision multicolor exoplanet transit photometry. We demonstrate photometric precisions of 0.057%, 0.050%, 0.060%, and 0.076% as root-mean-square residuals of 60 s binning in g, r, i, and zs bands, respectively, for a G0 V star WASP-12 (V = 11.57 ± 0.16). MuSCAT2 has started science operations since January 2018, with over 250 telescope nights per year. MuSCAT2 is expected to become a reference tool for exoplanet transit observations and substantially contributes to the follow-up of the Transiting Exoplanet Survey Satellite and Planetary Transits and Oscillations of stars space missions.
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