XMM-Newton Science Analysis System


sppartial (sppartial-0.12.2) [22.0.0-9173c7d25-20250127]

Algorithm

Read parameters
Open and read full FOV image FITS file (780x780 I32 array plus attributes).
Open and read full FOV spectum FITS file, extract BACKSCALE.

call CAL_spdetmap to get Soft Proton DETMAP for inst and filter.
Loop through both image array and SPDETMAP array to find SP contribution
    n = 0
    spfull = 0.
    do i=0,fimgXsize-1
       do ii=0,fimgYsize-1
          if (fimage_IP(i,ii) .gt. 0) then
             n = n + 1
             spfull = spfull + spdetmap_RP(i,ii)
          endif
       enddo
    enddo
    spfull = spfull / real(n)

Repeat for user-selected region image and spectrum
    n = 0
    spregion = 0.
    do i=0,rimgXsize-1
       do ii=0,rimgYsize-1
          if (rimage_IP(i,ii) .gt. 0) then
             n = n + 1
             spregion = spregion + spdetmap_RP(i,ii)
          endif
       enddo
    enddo
    spregion = spregion / real(n)

    rrnorm = rnorm * (backFOV/backREG) * (spfull/spregion)

Print rrnorm, backscale values