Atmospheric dispersion corrector for a multi-object spectroscopic mode of HROS-TMT

Manjunath Bestha; Amirul Hasan; Devika Divakar; Arun Surya; S. Sriram; T. Sivarani; Ajin Prakash; Parvathy M.; Sudharshan Yadav

doi:10.1117/12.2677192

4 October 2023 Atmospheric dispersion corrector for a multi-object spectroscopic mode of HROS-TMT

Manjunath Bestha, Amirul Hasan, Devika Divakar, Arun Surya, S. Sriram, T. Sivarani, Ajin Prakash, Parvathy M., Sudharshan Yadav

Author Affiliations +

Proceedings Volume 12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV; 126770Q (2023) https://doi.org/10.1117/12.2677192
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

Highly multiplexed spectroscopic surveys have changed the astronomy landscape in recent years. However, these surveys are limited to low and medium spectral resolution. High spectral resolution spectroscopy is often photon starved and will benefit from a large telescope aperture. Multiplexed high-resolution surveys require a wide field of view and a large aperture for a suitable large number of bright targets. This requirement introduces several practical difficulties, especially for large telescopes, such as the future ELTs. Some of the challenges are the need for a wide field atmospheric dispersion corrector and to deal with the curved non-telecentric focal plane. Here we present a concept of Multi-Object Spectroscopy (MOS) mode for TMT High-Resolution Optical Spectrograph (HROS), where we have designed an atmospheric dispersion corrector for individual objects that fit inside a fiber positioner. We present the ZEMAX design and the performance of the atmospheric dispersion corrector for all elevations accessible by TMT.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Manjunath Bestha, Amirul Hasan, Devika Divakar, Arun Surya, S. Sriram, T. Sivarani, Ajin Prakash, Parvathy M., and Sudharshan Yadav "Atmospheric dispersion corrector for a multi-object spectroscopic mode of HROS-TMT", Proc. SPIE 12677, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems IV, 126770Q (4 October 2023); https://doi.org/10.1117/12.2677192

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