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[bug #57301] MakeCatalog using river sum instead of mean times by clump


From: Mohammad Akhlaghi
Subject: [bug #57301] MakeCatalog using river sum instead of mean times by clump area
Date: Mon, 25 Nov 2019 15:05:34 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0

URL:
  <https://savannah.gnu.org/bugs/?57301>

                 Summary: MakeCatalog using river sum instead of mean times by
clump area
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Mon 25 Nov 2019 08:05:32 PM UTC
                Category: MakeCatalog
                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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Details:

Due to some typo during the re-write of MakeCatalog, it is mistakenly
subtracting the total river flux (around each clump) from the total clump
flux! But this is wrong!!! It should be like this: the total clump flux should
be divided by the mean river flux, multiplied by the number of clump pixels.
This resulted in negative S/N values in some situations.

This bug was found by Joseph Putko.




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