Conceptual design of the BRONCO spectrograph

Adam Rubin

doi:10.1117/12.2562033

13 December 2020 Conceptual design of the BRONCO spectrograph

Adam Rubin

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 1144776 (2020) https://doi.org/10.1117/12.2562033
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

"The astronomical community finds great utility in broadband medium resolution spectroscopy. Since its com- missioning, X-shooter has been one of the most heavily over-subscribed instruments on the VLT. To increase the availability of such facilities, the Son Of X-shooter instrument is being built for the NTT. Here we present the BRoadband Optical NIR COncept (BRONCO). This design is inspired by the novel SOXS visual arm, which splits the optical band into four sub-band and images them onto a single detector. BRONCO is a design for an 8.2m class telescope, and improves on the original design in several key ways: improved division of the bands, implementing it for a NIR arm and covering 0.32-1.8 um at resolution ~4500 for a 0.811 slit. Moreover we show an improved catadioptric camera design which uses the corrector in double pass, greatly simplifying the detector mounting and mechanics. Due to its optimized design BRONCO is expected to have throughput > 60%, excluding telescope and detector efficiencies-roughly 50% - 100% higher than X-shooter."

Citation Download Citation

Adam Rubin "Conceptual design of the BRONCO spectrograph", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144776 (13 December 2020); https://doi.org/10.1117/12.2562033

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