Relative timing calibration of the Resolve x-ray microcalorimeter onboard XRISM using the modulated x-ray source

Tomoki Omama; Masahiro Tsujimoto; Makoto Sawada; Caroline A. Kilbourne; Cor de Vries; Megan E. Eckart; Yoshitaka Ishisaki; Shunji Kitamoto; Maurice A. Leutenegger; Frederick S. Porter; Rob Wolfs

doi:10.1117/12.2629753

31 August 2022 Relative timing calibration of the Resolve x-ray microcalorimeter onboard XRISM using the modulated x-ray source

Tomoki Omama, Masahiro Tsujimoto, Makoto Sawada, Caroline A. Kilbourne, Cor de Vries, Megan E. Eckart, Yoshitaka Ishisaki, Shunji Kitamoto, Maurice A. Leutenegger, Frederick S. Porter, Rob Wolfs

Author Affiliations +

Proceedings Volume 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray; 1218162 (2022) https://doi.org/10.1117/12.2629753
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Resolve instrument onboard the x-ray imaging and spectroscopy mission (XRISM) hosts an x-ray microcalorimeter that consists of 36 pixels in an array operated at 50 mK. It is currently under development and will be launched in 2022. x-ray microcalorimeters are known for their high spectral resolution, but they also excel in timing resolution for the necessity of cross-correlating event signals with templates in the time domain for accurate energy derivation. Primary and redundant modulated x-ray sources (MXS) are installed in Resolve for the purpose of correcting changes in the energy scale of the microcalorimeters while minimizing additional background; each source is switched on for intervals of O (1 ms) with a duty cycle of ∼1 %. The MXS can also be utilized for calibrating relative timing as a function of pixel, event grade, and energy. We had a week-long run in 2022 June using the flight model hardware during the spacecraft level test with several different settings. We describe the method and the result of the relative timing calibration using this dataset.

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Tomoki Omama, Masahiro Tsujimoto, Makoto Sawada, Caroline A. Kilbourne, Cor de Vries, Megan E. Eckart, Yoshitaka Ishisaki, Shunji Kitamoto, Maurice A. Leutenegger, Frederick S. Porter, and Rob Wolfs "Relative timing calibration of the Resolve x-ray microcalorimeter onboard XRISM using the modulated x-ray source", Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 1218162 (31 August 2022); https://doi.org/10.1117/12.2629753

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