ASTRONIRCAM—the infrared camera-spectrograph for the 2.5-m telescope of SAI Caucasian observatory
- Authors: Nadjip A.E.1, Tatarnikov A.M.1, Toomey D.W.2, Shatsky N.I.1, Cherepashchuk A.M.1, Lamzin S.A.1, Belinski A.A.1
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Affiliations:
- Sternberg Astronomical Institute
- Mauna Kea Infrared LLC
- Issue: Vol 72, No 3 (2017)
- Pages: 349-362
- Section: Article
- URL: https://journals.rcsi.science/1990-3413/article/view/212527
- DOI: https://doi.org/10.1134/S1990341317030245
- ID: 212527
Cite item
Abstract
ASTRONIRCAM is a cryogenic-cooled slit camera-spectrograph for the spectral range 1–2.5 μm installed at the Nasmyth focus of the 2.5-meter telescope of the Caucasian observatory of the Sternberg Astronomical Institute of Lomonosov Moscow State University. The instrument is equipped with a HAWAII-2RG 2048×2048 HgCdTe array. Grisms are used as dispersive elements. In the photometric mode ASTRONIRCAM allows for extended astronomical object imaging in a 4.′6 × 4.′6 field of view with a 0.269 arcsec/pixel scale in standard photometric bands J, H, K, and Ks as well as in the narrow-band filters centered on the lines CH4, [Fe II], H2 v=1-0 S(1), Brγ, and CO. In the spectroscopic mode, ASTRONIRCAM takes spectra of extended or point-like sources with a spectral resolution of R = λ/Δλ ≤ 1200. The general design, optical system, detector electronics and readout, amplification and digitization schemes are considered. The GAIN conversion factor measurement results are described as well as its dependence on the accumulated signal (nonlinearity).
The full transmission of the atmosphere-to-detector train ranges from 40 to 50% in the wide-band photometry mode. The ASTRONIRCAMsensitivity at the 2.5-m telescope is characterized by the limiting J = 20, K = 19 stellar magnitudes measured with a 10% precision and 15 minute integration for 1″ atmospheric seeing conditions. References to the first results based on ASTRONIRCAM observations are given.
About the authors
A. E. Nadjip
Sternberg Astronomical Institute
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991
A. M. Tatarnikov
Sternberg Astronomical Institute
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991
D. W. Toomey
Mauna Kea Infrared LLC
Email: kolja@sai.msu.ru
United States, Hilo, HI, 96720
N. I. Shatsky
Sternberg Astronomical Institute
Author for correspondence.
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991
A. M. Cherepashchuk
Sternberg Astronomical Institute
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991
S. A. Lamzin
Sternberg Astronomical Institute
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991
A. A. Belinski
Sternberg Astronomical Institute
Email: kolja@sai.msu.ru
Russian Federation, Moscow, 119991