Mount Abu 2.5m Telescope: first light and performance assessment

Christian Bastin; Gregory P. Lousberg; Olivier Pirnay; Cédric Adam; Pierre Albart; Jonathan De Ville; Alexis Feutry; Carlo Flebus; Nicolas Fontana; Eric Gabriel; Audrey A. Lanotte; Fabien Lemagne; Thibault Leseur; Laurence Méant; Nathalie Ninane; Sabrina Orban; Jean-Marc Tortolani; Jonathan Verspecht

doi:10.1117/12.2632285

25 August 2022 Mount Abu 2.5m Telescope: first light and performance assessment

Christian Bastin, Gregory P. Lousberg, Olivier Pirnay, Cédric Adam, Pierre Albart, Jonathan De Ville, Alexis Feutry, Carlo Flebus, Nicolas Fontana, Eric Gabriel, Audrey A. Lanotte, Fabien Lemagne, Thibault Leseur, Laurence Méant, Nathalie Ninane, Sabrina Orban, Jean-Marc Tortolani, Jonathan Verspecht

Author Affiliations +

Proceedings Volume 12187, Modeling, Systems Engineering, and Project Management for Astronomy X; 121870H (2022) https://doi.org/10.1117/12.2632285
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

AMOS has recently completed the on-site erection and performance evaluation campaign of the 2.5m telescope that is installed on Mount Abu (India) for the Physical Research Laboratory. The 20-m-focal-length telescope has a Ritchey-Chrétien optical configuration. It is equipped with a primary active mirror; an active positioning of the secondary mirror and a first order adaptive optical system. It operates in the 0.37-4 μm spectral range. The project fulfillment relies on the AMOS multidisciplinary expertise in design; manufacturing and verification of high-accuracy optical; mechanical and opto-mechanical systems. This paper presents the assembly; integration; alignment and verifications carried out on site. The alignment relies on the coma-free point method. The end-to-end telescope performances (image quality; pointing; tracking) are measured on sky using the verification instrument in combination with wavefront-curvature sensing and lucky imaging techniques.

Conference Presentation

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Christian Bastin, Gregory P. Lousberg, Olivier Pirnay, Cédric Adam, Pierre Albart, Jonathan De Ville, Alexis Feutry, Carlo Flebus, Nicolas Fontana, Eric Gabriel, Audrey A. Lanotte, Fabien Lemagne, Thibault Leseur, Laurence Méant, Nathalie Ninane, Sabrina Orban, Jean-Marc Tortolani, and Jonathan Verspecht "Mount Abu 2.5m Telescope: first light and performance assessment", Proc. SPIE 12187, Modeling, Systems Engineering, and Project Management for Astronomy X, 121870H (25 August 2022); https://doi.org/10.1117/12.2632285

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