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Proceedings Paper

Spectroscopic Investigation of Nebular Gas (SING): a dedicated NUV spectrograph to study extended objects
Author(s): Bharat Chandra; B. G. Nair; Ambily Suresh; C. Shanti Prabha; Joice Mathew; Nirmal K.; Mayuresh Sarpotdar; Rekhesh Mohan; Margarita Safonova; Sripadmanaban Sriram; Jayant Murthy
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Paper Abstract

SING is a near ultraviolet (NUV) spectrograph with a size close to 6U CubeSat form-factor. The spectrograph operates in the wavelength range from 1800 Å to 3000 Å, with a spectral resolution of 2 Å at the central wavelength. The spectrograph is intended to operate in low Earth orbit (LEO), with the primary goal to generate spectral maps of the regions of the sky covered within the field of view (FOV) of the instrument, constrained by the orbital inclination of the spacecraft. The payload consists of the telescope in Cassegrain configuration focusing the light on the slit, the corrector lens, the concave grating, the detector, and other required electronics components. As the event rate in the UV is low, the spectrograph employs a photon-counting detector because of its low noise performance. The payload uses FPGA as the main system controller to handle the detector readout, data compression and storage, health monitoring, and telemetry. In this work, we present the optical design and its analysis, along with a brief description of the architecture of electronic subsystems of the payload.

Paper Details

Date Published: 3 January 2020
PDF: 8 pages
Proc. SPIE 11203, Advances in Optical Astronomical Instrumentation 2019, 112031K (3 January 2020); doi: 10.1117/12.2539889
Show Author Affiliations
Bharat Chandra, Indian Institute of Astrophysics (India)
B. G. Nair, Indian Institute of Astrophysics (India)
Ambily Suresh, Univ. of Colorado (United States)
C. Shanti Prabha, Indian Institute of Astrophysics (India)
Joice Mathew, The Australian National Univ. (Australia)
Nirmal K., Indian Institute of Astrophysics (India)
Mayuresh Sarpotdar, Nanyang Technological Univ. (Singapore)
Rekhesh Mohan, Indian Institute of Astrophysics (India)
Margarita Safonova, Indian Institute of Astrophysics (India)
Sripadmanaban Sriram, Indian Institute of Astrophysics (India)
Jayant Murthy, Indian Institute of Astrophysics (India)

Published in SPIE Proceedings Vol. 11203:
Advances in Optical Astronomical Instrumentation 2019
Simon C. Ellis; Céline d'Orgeville, Editor(s)

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