The XARM payload consists of two instruments:

  • Resolve, a soft X-ray spectrometer, which combines a lightweight Soft X-ray Telescope paired with a 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 arcmin.
  • Xtend, a soft X-ray Imager, is a CCD detector with a larger the field, at the focus of the second lightweights Soft X-ray Telescope in the energy range of 0.4-13 keV

Their characteristics are similar to the SXS and SXI respectively flown on Hitomi and XARM is designed to recover the science capability lost with the Hitomi incident.