JASMINE image simulator for high-precision astrometry and photometry

Takafumi Kamizuka; Hajime Kawahara; Ryou Ohsawa; Hirokazu Kataza; Daisuke Kawata; Yoshiyuki Yamada; Teruyuki Hirano; Kohei Miyakawa; Masataka Aizawa; Masashi Omiya; Taihei Yano; Ryouhei Kano; Takehiko Wada; Wolfgang Löffler; Michael Biermann; Pau Ramos; Naoki Isobe; Fumihiko Usui; Kohei Hattori; Satoshi Yoshioka; Takayuki Tatekawa; Hideyuki Izumiura; Akihiko Fukui; Makoto Miyoshi; Daisuke Tatsumi; Naoteru Gouda

doi:10.1117/12.3017770

23 August 2024 JASMINE image simulator for high-precision astrometry and photometry

Takafumi Kamizuka, Hajime Kawahara, Ryou Ohsawa, Hirokazu Kataza, Daisuke Kawata, Yoshiyuki Yamada, Teruyuki Hirano, Kohei Miyakawa, Masataka Aizawa, Masashi Omiya, Taihei Yano, Ryouhei Kano, Takehiko Wada, Wolfgang Löffler, Michael Biermann, Pau Ramos, Naoki Isobe, Fumihiko Usui, Kohei Hattori, Satoshi Yoshioka, Takayuki Tatekawa, Hideyuki Izumiura, Akihiko Fukui, Makoto Miyoshi, Daisuke Tatsumi, Naoteru Gouda

Author Affiliations +

Proceedings Volume 13099, Modeling, Systems Engineering, and Project Management for Astronomy XI; 130992D (2024) https://doi.org/10.1117/12.3017770
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

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.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Takafumi Kamizuka, Hajime Kawahara, Ryou Ohsawa, Hirokazu Kataza, Daisuke Kawata, Yoshiyuki Yamada, Teruyuki Hirano, Kohei Miyakawa, Masataka Aizawa, Masashi Omiya, Taihei Yano, Ryouhei Kano, Takehiko Wada, Wolfgang Löffler, Michael Biermann, Pau Ramos, Naoki Isobe, Fumihiko Usui, Kohei Hattori, Satoshi Yoshioka, Takayuki Tatekawa, Hideyuki Izumiura, Akihiko Fukui, Makoto Miyoshi, Daisuke Tatsumi, and Naoteru Gouda "JASMINE image simulator for high-precision astrometry and photometry", Proc. SPIE 13099, Modeling, Systems Engineering, and Project Management for Astronomy XI, 130992D (23 August 2024); https://doi.org/10.1117/12.3017770

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