| Name: | Arun Surya |
| Affiliation: | Indian Institute of Astrophysics |
| Conference ID : | ASI2024_442 |
| Title : | MOIS Configurable Slit Spectrograph: Understanding the design performance through end-to-end modeling |
| Authors : | Arun Surya1, Satheesha Poojary2, Manoj Puravankara2, Bhaswati Mookerjea2, Savio L.A. D.'Costa2, Mayank Narang3, Bihan Banerjee2, Himanshu Tyagi2 |
| Authors Affiliation: | 1 Indian Institute of Astrophysics, Bangalore - 560034, India
2 Tata Institute of Fundamental Research, Mumbai, India
3 Academia Sinica Institute of Astronomy \& Astrophysics, Taipei, Taiwan |
| Mode of Presentation: | Poster |
| Abstract Category : | Facilities, Technologies and Data science |
| Abstract : | MOIS is a multi-object configurable slit spectrograph designed to be used with the 3.6 Devasthal Optical Telescope (DOT). It will cover the near-infrared wavelength band of 0.97 - 2.37 microns and have a spectroscopic field of view of 9 x 3 arc minutes and an imaging field of view of 9.6 arc minute diameter . MOIS is being designed as a precursor to a future multi-object spectrograph for the planned National Large Optical Telescope (NLOT) in India. MOIS is currently designed with a modular configurable slit unit of 5 slits created by 10 bars moving pair-wise in opposition. The slit unit can be upgraded independently to increase the multiplexing capability. We have completed the prototype testing of the configurable slit unit (CSU) in cryo temperatures and completed the optical design. To understand the performance of the instrument we have developed extensive end-to-end modelling and raw data simulations. These simulations use the optical design and also realistically model various background noise sources in the spectrograph including the thermal background from the slit unit. We describe the spectral formats, performance and sensitivity analysis of MOIS estimated through our modeling. |
