X-ray mirror assembly for the X-ray Imaging and Spectroscopy Mission (XRISM): comparison between ground-calibration measurements and raytracing simulations

Rozenn Boissay-Malaquin; Takayuki Hayashi; Keisuke Tamura; Takashi Okajima; Tahir Yaqoob; Megan E. Eckart; Natalie Hell; Maurice Leutenegger; Michael Loewenstein; Toshiki Sato

doi:10.1117/12.3020154

21 August 2024 X-ray mirror assembly for the X-ray Imaging and Spectroscopy Mission (XRISM): comparison between ground-calibration measurements and raytracing simulations

Rozenn Boissay-Malaquin, Takayuki Hayashi, Keisuke Tamura, Takashi Okajima, Tahir Yaqoob, Megan E. Eckart, Natalie Hell, Maurice Leutenegger, Michael Loewenstein, Toshiki Sato

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 1309367 (2024) https://doi.org/10.1117/12.3020154
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The X-Ray Imaging and Spectroscopy Mission (XRISM) is a collaborative mission between the Japan Aerospace Exploration Agency (JAXA) and the National Aeronautics and Space Administration (NASA), with the participation of the European Space Agency (ESA). This mission is designed to investigate celestial X-ray objects in the Universe with high-throughput imaging and high-resolution spectroscopy, using its Xtend and Resolve instruments. The satellite was successfully launched from Japan in September 2023. The ground-based calibration of the X-ray Mirror Assemblies (XMAs) for both instruments onboard the XRISM satellite was performed at several facilities, almost exclusively at NASA’s Goddard Space Flight Center. A raytracing simulator (xrtraytrace) has been developed by the Hitomi and XRISM teams, and its XRISM model input files have been tuned to reproduce the calibration data. In this paper, we first present the various ground-calibration measurements. We then explain the analyses of the data resulting from these measurements. Next, we show how we used the products of these analyses to tune the simulator parameters in order to match the calibration measurements. Finally, we show a comparison of the simulated results with the measured effective areas, vignetting curves, and point spread functions. We found that the on-axis effective area measurements and the raytracing results are consistent within 6% in the nominal energy band, and the off-axis effective areas at 6.4 keV agree within 5% for Resolve-XMA (up to 5′) and within 8% for Xtend-XMA (up to 20′). Furthermore, the tuned raytracing simulator allows the on-axis PSF to be reproduced with less than 40% accuracy for both XMAs (at 1.5, 6.4 and 9.4 keV).

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

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Rozenn Boissay-Malaquin, Takayuki Hayashi, Keisuke Tamura, Takashi Okajima, Tahir Yaqoob, Megan E. Eckart, Natalie Hell, Maurice Leutenegger, Michael Loewenstein, and Toshiki Sato "X-ray mirror assembly for the X-ray Imaging and Spectroscopy Mission (XRISM): comparison between ground-calibration measurements and raytracing simulations", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 1309367 (21 August 2024); https://doi.org/10.1117/12.3020154

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