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Characterization of the ASTRONIRCAM Spectral Mode

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Abstract

The algorithm for the reduction of spectroscopic observations with the ASTRONIRCAM camera-spectrograph installed at the 2.5-m telescope of the Sternberg Astronomical Institute of the Moscow State University is described. The instrument allows spectra of astronomical objects with long (\(280^{\prime\prime}\)) and short (\(10^{\prime\prime}\)) slits to be taken in the wavelength range from 1 to 2.5 \(\mu\)m. The measured resolution reaches \(R=1270\) for a \(0\overset{{}^{\prime\prime}}{.}9\) slit; the light efficiency of the system changes from 6 to \(14\%\) in the working wavelength range in the long-slit mode and from 1 to \(2\%\) in the cross-dispersion mode. The transmission is limited by the quality of the grisms used. We have estimated the fraction of scattered light and studied the mechanical flexures and temperature drifts of the structure.

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Funding

S.G. Zheltoukhov and N.I. Shatsky thank the Russian Science Foundation (grant no. 17-12-01241) for its partial financial support of this study (the development and implementation of a spectroscopic data correction algorithm and the analysis of our results). The work was performed using the equipment acquired through the funds of the Program for Development of the Moscow State University.

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Moscow State University (SAI MSU), Universitetskii pr. 13, 119992, Moscow, Russia

    S. G. Zheltoukhov, A. M. Tatarnikov & N. I. Shatsky

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  1. S. G. Zheltoukhov
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  2. A. M. Tatarnikov
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  3. N. I. Shatsky
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Correspondence to A. M. Tatarnikov.

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Translated by V. Astakhov

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Zheltoukhov, S.G., Tatarnikov, A.M. & Shatsky, N.I. Characterization of the ASTRONIRCAM Spectral Mode. Astron. Lett. 46, 193–203 (2020). https://doi.org/10.1134/S106377372002005X

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  • DOI: https://doi.org/10.1134/S106377372002005X

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