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X-Ray Imaging and Spectroscopy Mission (XRISM)



The X-Ray Imaging and Spectroscopy Mission (XRISM, pronounced 'krism'), is a soft X-ray astronomy collaboration between the Japanese space agency (JAXA) and NASA with European space agency (ESA) participation. XRISM, formerly the X-ray Astronomy Recovery Mission (XARM), is the seventh X-ray observatory that JAXA has developed, and is the fifth that has had NASA participation. XRISM will explore the high-energy processes taking place in virtually all celestial objects, particularly supernova remnants, galaxies, clusters of galaxies and the environments around neutron stars and black holes. XRISM will also make precise measurements of the plasma conditions at selected targets throughout the universe.

To accomplish these goals, XRISM carries two instruments allowing soft X-ray observations in the range 0.3-13 keV. The Resolve instrument combines a lightweight grazing X-ray Mirror Assembly (XMA) paired with an X-ray calorimeter spectrometer and provides non-dispersive 5-7 eV energy resolution in the 0.3-12 keV bandpass with a field of view of about 3 arcminutes. The Xtend instrument is an array of four CCD detectors that extend the field of the observatory to 38 arcminutes on a side over the energy range 0.4-13 keV, using an identical lightweight XMA.

XRISM launched on September 6 at 23:42:11 UT (September 7, 8:42:11 a.m. JST) as a "ride-share" payload with the SLIM mission on an H2A booster from the Tanegashima Space Center in Japan. It will be placed into a circular geocentric orbit with an altitude of 550 km.

Alternate Names

  • 57800

Facts in Brief

Launch Date: 2023-09-06
Launch Vehicle: H-2A
Launch Site: Tanegashima, Japan
Mass: 2300 kg

Funding Agencies

  • National Aeronautics and Space Administration (United States)
  • Japan Aerospace Exploration Agency (Japan)


  • Astronomy

Additional Information

Questions and comments about this spacecraft can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Dr. Hironori MaejimaProject ManagerJapan Aerospace Exploration Agency
Dr. Makoto S TashiroMission Principal InvestigatorInstitute of Space and Aeronautical

Selected References

  • Tashiro, M., et al., Concept of the X-ray Astronomy Recovery Mission, in Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, Proc. SPIE Vol. 10699, 1069922, doi:10.1117/12.2309455, Jul. 2018.
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