Kamizuka, T;
Kawahara, H;
Ohsawa, R;
Kataza, H;
Kawata, D;
Yamada, Y;
Hirano, T;
... Gouda, N; + view all
(2024)
JASMINE image simulator for high-precision astrometry and photometry.
In: Roberts, Scott and Egner, Sébastien E, (eds.)
Proceedings of SPIE - The International Society for Optical Engineering.
(pp. pp. 1-13).
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Abstract
JASMINE is a Japanese planned space mission that aims to reveal the formation history of our Galaxy and discover habitable exoEarths. For these objectives, the JASMINE satellite performs high-precision astrometric observations of the Galactic bulge and high-precision transit monitoring of M-dwarfs in the near-infrared (1.0-1.6 µm in wavelength). For feasibility studies, we develop an image simulation software named JASMINE-imagesim, which produces realistic observation images. This software takes into account various factors such as the optical point spread function (PSF), telescope jitter caused by the satellite's attitude control error (ACE), detector flat patterns, exposure timing differences between detector pixels, and various noise factors. As an example, we report a simulation for the feasibility study of astrometric observations using JASMINE-imagesim. The simulation confirms that the required position measurement accuracy of 4 milliarcseconds for a single exposure of 12.5-mag objects is achievable if the telescope pointing jitter uniformly dilutes the PSF across all stars in the field of view. On the other hand, the simulation also demonstrates that the combination of realistic pointing jitter and exposure timing differences in the detector can significantly degrade accuracy and prevent achieving the requirement. This means that certain countermeasures against this issue must be developed. This result implies that this kind of simulation is important for mission planning and advanced developments to realize more realistic simulations help us to identify critical issues and also devise effective solutions.
| Type: | Proceedings paper |
|---|---|
| Title: | JASMINE image simulator for high-precision astrometry and photometry |
| Event: | SPIE Astronomical Telescopes + Instrumentation, 2024 |
| Location: | Yokohama, Japan |
| Dates: | 16th- 22nd June 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3017770 |
| Publisher version: | http://dx.doi.org/10.1117/12.3017770 |
| 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: | JASMINE, near-infrared, astrometry, photometry, image simulation, ePSF |
| 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 Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10198248 |
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