Designs of Mt. Abu faint object spectrograph and camera - echelle polarimeter (M-FOSC-EP) and its prototype: spectro-polarimeters for PRL 1.2m and 2.5m Mt. Abu Telescopes, India

Vipin Kumar; Mudit K. Srivastava; Vaibhav Dixit; Bhavesh Mistry; Kevikumar Lad; Ankita Patel; Arvind S. Rajpurohit

doi:10.1117/12.2629090

29 August 2022 Designs of Mt. Abu faint object spectrograph and camera - echelle polarimeter (M-FOSC-EP) and its prototype: spectro-polarimeters for PRL 1.2m and 2.5m Mt. Abu Telescopes, India

Vipin Kumar, Mudit K. Srivastava, Vaibhav Dixit, Bhavesh Mistry, Kevikumar Lad, Ankita Patel, Arvind S. Rajpurohit

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121845B (2022) https://doi.org/10.1117/12.2629090
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Mt. Abu Faint Object Spectrograph and Camera-Echelle Polarimeter (M-FOSC-EP) is a two-channel multimode instrument currently under design for the upcoming PRL 2.5m telescope at Mt. Abu, India. M-FOSC-EP would provide capabilities of seeing limited imaging, low-resolution spectroscopy (R∼500-800), and high-resolution spectro-polarimetry (R∼15000) over the visible waveband. This design uses a common collimator optics, followed by a movable fold mirror to direct the incoming telescope beam into either of the low-resolution and spectropolarimetry modules, which are equipped with their separate detector system. As a precursor of M-FOSC-EP, a prototype spectro-polarimeter named ProtoPol is also being developed with commercially off-the-shelf optical components. ProtoPol could be used on existing 1.2m as well as on upcoming 2.5m PRL telescopes. Here we present the optical designs and performances of M-FOSC-EP and ProtoPol. In addition, the opto-mechanical design of ProtoPol has been presented.

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Vipin Kumar, Mudit K. Srivastava, Vaibhav Dixit, Bhavesh Mistry, Kevikumar Lad, Ankita Patel, and Arvind S. Rajpurohit "Designs of Mt. Abu faint object spectrograph and camera - echelle polarimeter (M-FOSC-EP) and its prototype: spectro-polarimeters for PRL 1.2m and 2.5m Mt. Abu Telescopes, India", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121845B (29 August 2022); https://doi.org/10.1117/12.2629090

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