| cntr1 | cntr2 |                  plus |                 minus |         diff             |
| int   | int   |                  char |                  char |         char             |
       0       2  hdu0_raw_image_1.fits   hdu0_raw_image_2.fits  diff.000000.000002.fits
       0       3  hdu0_raw_image_1.fits   hdu0_raw_image_3.fits  diff.000000.000003.fits
       0       4  hdu0_raw_image_1.fits   hdu0_raw_image_4.fits  diff.000000.000004.fits
       1       7 hdu0_raw_image_10.fits   hdu0_raw_image_7.fits  diff.000001.000007.fits
       1       9 hdu0_raw_image_10.fits   hdu0_raw_image_9.fits  diff.000001.000009.fits
       2       3  hdu0_raw_image_2.fits   hdu0_raw_image_3.fits  diff.000002.000003.fits
       3       4  hdu0_raw_image_3.fits   hdu0_raw_image_4.fits  diff.000003.000004.fits
       3       5  hdu0_raw_image_3.fits   hdu0_raw_image_5.fits  diff.000003.000005.fits
       3       6  hdu0_raw_image_3.fits   hdu0_raw_image_6.fits  diff.000003.000006.fits
       4       5  hdu0_raw_image_4.fits   hdu0_raw_image_5.fits  diff.000004.000005.fits
       5       6  hdu0_raw_image_5.fits   hdu0_raw_image_6.fits  diff.000005.000006.fits
       5       7  hdu0_raw_image_5.fits   hdu0_raw_image_7.fits  diff.000005.000007.fits
       5       8  hdu0_raw_image_5.fits   hdu0_raw_image_8.fits  diff.000005.000008.fits
       6       7  hdu0_raw_image_6.fits   hdu0_raw_image_7.fits  diff.000006.000007.fits
       7       8  hdu0_raw_image_7.fits   hdu0_raw_image_8.fits  diff.000007.000008.fits
       7       9  hdu0_raw_image_7.fits   hdu0_raw_image_9.fits  diff.000007.000009.fits
       8       9  hdu0_raw_image_8.fits   hdu0_raw_image_9.fits  diff.000008.000009.fits