2017/06/27 by A. E. Nadjip, A. M. Tatarnikov, D. W. Toomey +4
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #Detector #Infrared astronomy #Infrared telescope #Limiting magnitude #Observatory #Optical Polarization and Ellipsometry #Photometry (optics) #Spectral resolution #Spectrograph #Telescope #astro-ph.IM
paper · pdf · doi:10.1134/s1990341317030245
published as Astroph. Bull, 72, issue 3, p.349, 2017 · Accepted in Astrophysical Bulletin. 23 pages, 9 figures, 7 tables
arxiv created 2017/06/27 · openalex publication_date 2017/07/01 · openalex created_date 2017/07/14 · arxiv updated 2017/09/15 · openalex updated_date 2026/08/05
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 K s as well as in the narrow-band filters centered on the lines CH4, [Fe II], H2 v=1-0 S(1), Br γ , 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.