Detailed design of the science operations for the XRISM mission

Abstract

X-Ray Imaging and Spectroscopy Mission (XRISM) is an x-ray astronomical mission led by the Japan Aerospace Exploration Agency (JAXA) and National Aeronautics and Space Administration (NASA), with collaboration from the European Space Agency (ESA) and other international participants, that is planned for launch in 2022 (Japanese fiscal year), to quickly restore high-resolution x-ray spectroscopy of astrophysical objects using the microcalorimeter array after the loss of Hitomi satellite. In order to enhance the scientific outputs of the mission, the Science Operations Team (SOT) is structured independently from the Instrument Teams (ITs) and the Mission Operations Team. The responsibilities of the SOT are divided into four categories: (1) guest observer program and data distributions, (2) distribution of analysis software and the calibration database, (3) guest observer support activities, and (4) performance

Anticipating the XRISM search for the decay of resonantly produced sterile neutrino dark matter

“…It had been hoped that the Hitomi mission would make the required measurement with its state-of-the-art calorimeter, but the mission was lost after a month and the data obtained prior to the failure were not sufficient to detect the line feature (Aharonian et al 2017). The next opportunity to test the line velocity dispersion will come with the XRISM mission (Terada et al 2021).…”

“…Anderson et al 2015;Jeltema & Profumo 2016;Dessert et al 2020b). Further light is ex-★ E-mail: lovell@hi.is pected to be shed on this subject by the launch of the JAXA XRISM mission in May 2023 (Terada et al 2021), where a detection of the line, and subsequently a measurement of the lines' velocity dispersion, would constitute a particularly compelling piece of evidence for a dark matter decay origin (Lovell et al 2019b).…”

High count rate effects in event processing for XRISM/Resolve x-ray microcalorimeter

“…The data were processed as flight-like as possible using the pre-pipeline 16 and pipeline 17 processing developed for the in-orbit data. We made some modifications to be compatible with the instrument-level test data that (from top to bottom) Rate of CPU consumption, FPGA-detected event candidate, HR, MR, LR, and anti-co events for each CPU in different colors.…”

Ground calibration of the x-ray mirror assembly for the x-ray imaging and spectroscopy mission (XRISM) I-measurement setup and effective area

“…The X-Ray Imaging and Spectroscopy Mission (XRISM, formerly XARM [1][2][3][4] ) is a mission developed under an international collaboration of Japan Aerospace Exploration Agency (JAXA), National Aeronautics and Space Administration (NASA), and European Space Agency (ESA), scheduled to be launched in early 2023. It will observe the Universe in X-rays with unprecedented sensitivity and spectral resolution, using its high-spectralresolution imaging microcalorimeter and its large-field CCD imager, named Resolve and Xtend, respectively.…”