Abstract
We described the design and operation principles of a new tunable-filter photometer developed for the 1-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and the 2.5-m telescope of the Sternberg Astronomical Institute of the Moscow State University. The instrument is mounted on the scanning Fabry-Perot interferometer operating in the tunable-filter mode in the spectral range of 460-800 nm with a typical spectral resolution of about 1.3 nm. It allows one to create images of galactic and extragalactic nebulae in the emission lines having different excitation conditions and to carry out diagnostics of the gas ionization state. The main steps of observations, data calibration, and reduction are illustrated by examples of different emission-line objects: galactic H ii regions, planetary nebulae, active galaxies with extended filaments, starburst galaxies, and Perseus galaxy cluster.
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Notes
‘Mangal’ is a Caucasian and Middle-East barbeque.
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Acknowledgements
This study was supported by the Russian Science Foundation, project no. 17-12-01335 ‘Ionized gas in galaxy discs and beyond the optical radius’. Observations conducted with the telescopes of the Special Astrophysical Observatory of the Russian Academy of Sciences carried out with the financial support of the Ministry of Science and Higher Education of the Russian Federation (including agreement No. 05.619.21.0016, project ID RFMEFI61919X0016). The work of 2.5-m telescope is supported by the Program of development of M.V. Lomonosov Moscow State University). The Andor detector was purchased within the framework of the Russian Science Foundation grant no.14-22-00041. The authors are thankful to Victor Afanasiev and Vladimir Amirkhanyan for their help and fruitful comments on the MaNGaL design, Marya Burlak, Victor Komarov, Andrey Tatarnikov, Nikolay Shatskii, Victor Senik, and Olga Voziakova for their help and assistance in 1-m and 2.5-m telescope observations, Oleg Egorov for the help with preparing color illustrations, Aleksandrina Smirnova for the text improving and an anonymous reviewer for the comments and suggestions.
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Moiseev, A., Perepelitsyn, A. & Oparin, D. Mapper of Narrow Galaxy Lines (MaNGaL): new tunable filter imager for Caucasian telescopes. Exp Astron 50, 199–214 (2020). https://doi.org/10.1007/s10686-020-09672-x
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DOI: https://doi.org/10.1007/s10686-020-09672-x