Bernard, Lee;
Jensen, Logan;
Gamaunt, Johnathan;
Butler, Nat;
Bocchieri, Andrea;
Changeat, Quentin;
D'Alessandro, Azzurra;
... Waldmann, Ingo; + view all
(2022)
Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope.
In: Evans, CJ and Bryant, JJ and Motohara, K, (eds.)
Ground-based and Airborne Instrumentation for Astronomy IX.
SPIE - The International Society for Optical Engineering: Montreal, QC, Canada.
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Abstract
The EXoplanet Climate Infrared TElescope (EXCITE) experiment is a balloon-borne, purpose-designed mission to measure spectroscopic phase curves of short-period extrasolar giant planets (EGPs, or “hot Jupiters”). Here, we present EXCITE’s principal science instrument: a high-throughput, single-object spectrograph operating in the 0.8-2.5 µm and 2.5-4.0 µm bands with R≥50. Our compact design achieves diffraction-limited, on-axis performance with just three powered optics: two off-axis parabolic mirrors and a CaF2 prism. We discuss the optical and mechanical design, the expected optical performance of the spectrograph, and summarize the tolerances needed to achieve that performance. We also discuss plans for establishing alignment of the optics and verifying the optical performance.
| Type: | Proceedings paper |
|---|---|
| Title: | Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope |
| Event: | SPIE Astronomical Telescopes + Instrumentation 2022 |
| Location: | Montreal, CANADA |
| Dates: | 17 Jul 2022 - 22 Jul 2022 |
| ISBN-13: | 978-1-5106-5349-8 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2629717 |
| Publisher version: | https://doi.org/10.1117/12.2629717 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Exoplanet spectroscopy, hot Jupiters, balloon-borne instrumentation, infrared instrumentation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10160199 |
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