Front optics design of TIFR-ARIES Multi-Object Optical to Near Infrared Spectrometer (TA-MOONS)

Poojary, S. S; Krishna Reddy, B; Ninan, Joe. P; Shah, Harshit; Ojha, D.K; Sharma, Saurabh; Reji, Varghese; Surya, Arun; Udhwani, Purvi; Costa, S. L. D; Naik, M. B; Mookerjea, B; Puravankara, Manoj; Tendulkar, Shriharsh; Jadhav, R. B; Sandimani, P. R; Gharat, S. M; Bhagat, S. B; Jadhav, Krushna

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Front optics design of TIFR-ARIES Multi-Object Optical to Near Infrared Spectrometer (TA-MOONS)

Poojary, S. S; Krishna Reddy, B; Ninan, Joe. P; Shah, Harshit; Ojha, D.K; Sharma, Saurabh; Reji, Varghese; Surya, Arun; Udhwani, Purvi; Costa, S. L. D; Naik, M. B; Mookerjea, B; Puravankara, Manoj; Tendulkar, Shriharsh; Jadhav, R. B; Sandimani, P. R; Gharat, S. M; Bhagat, S. B; Jadhav, Krushna

URI: http://hdl.handle.net/2248/8552

Date: 2024-06

Abstract:

TA-MOONS is a multi-object Optical to Near Infrared (NIR) spectrometer with the primary science cases to conduct a spectroscopic survey of Young Stellar Objects (YSO’s) at visible as well as at NIR wavebands simultaneously at a spectroscopic resolution of R~2700. The wavelength coverage of this instrument is from 0.36-2.50 microns. The instrument is jointly developed by TIFR and ARIES, designed for 3.6 meter Devasthal Optical Telescope (DOT)1 as a second generation main port instrument. The instrument is capable of observing 8-sources simultaneously within the sky field of view (FoV) of 12 arcmin diameter with its front optics deployable slit (DS) technique. These are mirror based 8-pickup arms located around the telescope focal plane. The DS is a novel concept consisting of tiny mirror-based arms having translation and rotational motion to pick up the source within each arm’s patrol field. This manuscript presents the optical design of front optics and probe viewer/calibration optics. Conceptual idea of the two-arm spectrometer also presented.