| Name: B Krishna Reddy |
| Affiliation: ARIES,Nainital |
| Conference ID: ASI2026_1198 |
| Title: Optical design of TA-MOONS Spectrographs |
| Abstract Type: Invited |
| Abstract Category: Facilities, Technologies and Data science |
| Author(s) and Co-Author(s) with Affiliation: B.Krishna Reddy(Aryabhatta Research Institute of Observational Sciences (ARIES)), Joe. P. Ninan(Tata Institute of Fundamental Research (TIFR)), S.S.Poojary(Tata Institute of Fundamental Research (TIFR)), Saurabh Sharma(Aryabhatta Research Institute of Observational Sciences (ARIES)) |
| Abstract: TIFR and ARIES are jointly developing the TA-MOONS (TIFR ARIES Multi-Object Optical to Near Infrared Spectrograph). The primary science goal of the instrument is to conduct the largest broadband spectroscopic survey of the Young Stellar Objects (YSO’s).This will be the second generation instrument for 3.6 meter Devasthal Optical Telescope, located at Nainital, Uttarakhand, India. This instrument uses a deployable slit (DS) technology. The front optics of the instrument uses the mirror based robotic pick-up arm system (8-nos) around the focal plane, each having translation and rotation movement capability to reach its patrol region of the sky field.The instrument will have capability to observe 8-sources simultaneously within the sky FOV of 12 arc-min diameter. The 8 pick up arms will cover the approx. 12 arc-min sky field of view at the telecentric telescope focal plane. The relayed image by the pick-up arm is further relayed by a generalized Offner relay, to form a compact 9 mm staggered slit that forms input to the two arm spectrographs. It will simultaneously obtain the spectra from 360nm to 2500nm without any gaps at a resolution of R~2700. The entire wavelength range is covered by two spectrographs namely optical channel and infrared channel. The optical channel covers the wavelength range from 360nm-960nm and the infrared channel covers the wavelength range from 860nm-2500nm. In this talk I will present the detailed optical designs of both the spectrographs and also other explored white pupil designs considered for these spectrographs. |
