[bug #62679] MakeProfiles kernel only normalized when zeropoint is 0

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?62679>

                 Summary: MakeProfiles kernel only normalized when zeropoint
is 0
                 Project: GNU Astronomy Utilities
               Submitter: makhlaghi
               Submitted: Tue 28 Jun 2022 04:31:49 PM BST
                Category: MakeProfiles
                Severity: 3 - Normal
              Item Group: Output not reasonable
                  Status: In Progress
                 Privacy: Public
             Assigned to: makhlaghi
             Open/Closed: Open
         Discussion Lock: Any


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Follow-up Comments:


-------------------------------------------------------
Date: Tue 28 Jun 2022 04:31:49 PM BST By: Mohammad Akhlaghi <makhlaghi>
When MakeProfiles builds a kernel (through the '--kernel' option), the output
image is only normalized (the sum of its values become 1) when the zeropoint
is 0. Changing the zeropoint will change the sum of the pixels which is not
expected! See the commands below:


$ astmkprof --kernel=gaussian,2,5 --zeropoint=0  -oz0.fits

$ astmkprof --kernel=gaussian,2,5 --zeropoint=22 -oz22.fits

$ aststatistics z0.fits  --sum       # Sum ==1 (as expected)
0.9999999988

$ aststatistics z22.fits --sum       # Sum !=1 (not expected!)
630957631.4


This bug was found with the help of Raul Infante-Sainz.







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