TANSPEC: TIFR-ARIES Near Infrared Spectrometer

Abstract

We present the design and performance of the TANSPEC, a medium-resolution $0.55-2.5\mu$m cryogenic spectrometer and imager, now in operation at the 3.6-m Devasthal Optical Telescope (DOT), Nainital, India. The TANSPEC provides three modes of operation which include, photometry with broad- and narrow-band filters, spectroscopy with short slits of 20${}^{\prime \prime }$ length and different widths (from 0.5${}^{\prime \prime }$ to 4.0${}^{\prime \prime }$) in cross-dispersed mode at a resolving power R of $\sim$2750, and spectroscopy with long slits of 60${}^{\prime \prime }$ length and different widths (from 0.5${}^{\prime \prime }$ to 4.0${}^{\prime \prime }$) in prism mode at a resolving power R of $\sim$100-350. TANSPEC's imager mode provides a field of view of 60${}^{\prime \prime }\times 60^{\prime \prime }$ with a plate scale of 0.245${}^{\prime \prime }$/pixel on the 3.6-m DOT. The TANSPEC was successfully commissioned during April-May 2019 and the subsequent characterization and astronomical observations are presented here. The TANSPEC has been made available to the worldwide astronomical community for science observations from October 2020.

arXiv comment35 pages, Accepted for publication in - Publications of the Astronomical Society of the Pacific (PASP)

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Cited by in corpus (9)

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• Recent observations of peculiar Gamma-ray bursts using 3.6 m Devasthal Optical Telescope (DOT)
• Teutsch 76: a Deep Near-Infrared Study
• pyTANSPEC: A Data Reduction Package for TANSPEC
• Kronberger 55: A Candidate for End-dominated Collapse Scenario
• Identifying the population of T-Tauri stars in Taurus: UV-optical synergy
• Quiescence of an Outburst of a Low-Mass Young Stellar Object: LDN1415-IRS
• Pathway to Devasthal Astronomical Observatory, ARIES