X-Ray Imaging and Spectroscopy Mission Guest Scientist Program (ROSES 2022)

Funding Agency:
National Aeronautics and Space Administration

The X-ray Imaging and Spectroscopy Mission (XRISM) is a Japan Aerospace Exploration Agency (JAXA)-NASA collaborative mission with European Space Agency (ESA) participation. XRISM will offer non-dispersive, high-resolution X-ray spectroscopy in the soft X-ray bandpass (~0.3–12 keV), while offering complementary CCD imaging resolution over a wide field of view. Four science categories have been defined for XRISM: (1) Structure formation of the Universe and evolution of clusters of galaxies; (2) Circulation history of baryonic matter in the Universe; (3) Transport and circulation of energy in the Universe; (4) New science with unprecedented high-resolution X-ray spectroscopy. 

XRISM has two complementary instruments, the Resolve Soft X-ray Spectrometer and the Xtend X-ray Imager. The instruments will be functionally identical to the Hitomi Soft X-ray Spectrometer and Soft X-ray Imager. A brief description of these instruments can be found in Tashiro et al., Proc. SPIE, Vol. 10699, id. 1069922 (2018). 

The Resolve instrument, a high-resolution, non-dispersive X-ray microcalorimeter, is developed jointly by NASA and JAXA. It is the core instrument on XRISM, covering the 0.3–12 keV energy band, where many astrophysically abundant elements have characteristic emission and absorption lines that can be used to study matter under extreme conditions. Its performance will be similar to that of the Hitomi Soft X-ray Spectrometer (SXS): spectral resolution of <7 eV across the 0.3–12 keV energy band; effective area of ~300 cm2 at 6 keV; a square field of view of roughly 3 arcminutes on a side with a 6x6 array of 30 arcsecond pixels; and angular resolution of roughly 1.3 arc minutes (half power diameter).

The Xtend instrument is developed by JAXA and covers the same energy band as the Resolve instrument. It expands the field of view of the observatory with a Charge Coupled Device (CCD) camera. It is expected to have similar performance to that of the Hitomi Soft X-ray Imager (SXI): typical CCD spectral resolution of approximately 170 eV at 6 keV; a square field of view approximately 40 arcminutes on a side with 1280x1280 pixels; and roughly the same angular resolution and effective area as Resolve. The Xray mirror assemblies (XMA) for Resolve and Xtend will be provided by NASA. 

Deadline: July 21, 2022





Engineering and Physical Sciences
Environmental & Life Sciences

External Deadline

July 21, 2022