Bernard, L;
Gamaunt, J;
Jensen, L;
Bocchieri, A;
Butler, N;
Changeat, Q;
D'Alessandro, A;
... Waldmann, I; + view all
(2024)
Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope.
In: Vernet, Joël R and Bryant, Julia J and Motohara, Kentaro, (eds.)
Proceedings of SPIE - The International Society for Optical Engineering.
(pp. 13096A5-1-13096A5-13).
SPIE
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Abstract
The EXoplanet Climate Infrared TElescope (EXCITE) is a near-infrared spectrograph (0.8-3.5 µm, R∼50) designed for measuring spectroscopic phase curves of transiting hot Jupiter-type exoplanets that operates off a high-altitude balloon platform. Phase curves produce a combination of phase curve and transit/eclipse spectroscopy, providing a wealth of information for characterizing exoplanet atmospheres. EXCITE will be a first-of-kind dedicated telescope uniquely able to observe a target nearly uninterrupted for tens of hours, enabling phase curve measurements, and complementing JWST. The spectrometer has two channels, a 0.8-2.5 µm band and a 2.5-3.5 µm band, providing a spectrum with a spectral resolution of R≥50. Two Off-Axis Parabolic (OAP) mirrors reimage the telescope focal plane to provide on-axis, diffraction-limited performance, wth a CaF2 prism providing dispersion. The spectrum is imaged with a single JWST flight spare Teledyne H2RG detector, providing Nyquist sampling of each channel. Here, we discuss the spectrograph's mechanical design, acceptance testing, assembly, and cryostat integration.
| Type: | Proceedings paper |
|---|---|
| Title: | Design and testing of a low-resolution NIR spectrograph for the EXoplanet Climate Infrared TElescope |
| Event: | SPIE Astronomical Telescopes + Instrumentation 2024 |
| Location: | Yokohama, Japan |
| Dates: | 16 Jun 2024 - 22 Jun 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3019286 |
| Publisher version: | http://dx.doi.org/10.1117/12.3019286 |
| 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.ucl.ac.uk/id/eprint/10199922 |
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