The RHESSI Flare Image Archive, located in the flare_images_v2 directory, contains image cube FITS files that can be used with RHESSI image object software, converted to map structures via hsi_fits2map, or read by any standard FITS reader.

The CLEAN algorithm is an advanced image reconstruction technique that iteratively removes the instrument’s point-spread function from the Back Projection image, reducing artifacts and improving resolution. CLEAN works by identifying bright components in the initial image, subtracting their modeled contributions, and restoring the residuals with a smoothed beam. This produces a more accurate and visually cleaner representation of the solar flare source compared to Back Projection.

CLEAN FITS files follow the naming convention hsi_imagecube_clean_YYYYMMDD_HHMM_xxxxx.fits, where YYYYMMDD and HHMM represent the observation date and start time (UTC), xxxxx indicates the bin size identifier, and .fits denotes the standard Flexible Image Transport System format.