== IPP Progress Report for the week 2013.02.18 - 2013.02.24 == 
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(Up to [wiki:IPP_Progress_Reports IPP Progress Reports])

=== Eugene Magnier ===

=== Serge Chastel ===

=== Heather Flewelling === 

=== Mark Huber ===

=== Bill Sweeney ===

=== Chris Waters ===

 * Tracked down bug in stacking to a bug in the EXT_FIT_ALL code I put into psphot.  This was causing all sources to be fit inappropriately, leading to all stars being flagged as extended objects, leading to poor choices of PSFs for matching at the stack stage.  Fixed on trunk.
 * Changed how WS diffs are queued in difftool.  Instead of locking the database once and using a temp table to hold all run/input data, load that information into difftool memory and do multiple transactions that operate on a single run at a time.  This allows the database to serve other requests.
 * Ran background continuity/background replacement code on M31.  JPEGs are not automatically generated for background replacement, so I had to generate them manually.  There are obvious issues on the scale of cells around large bright objects, likely due to the cell-level continuity not dealing with these steep gradients.
 * [wiki:GPC1_M31_OTA_Offset_Study] Looked into the reports that there are OTA level shifts in M31 images that have not had a background subtracted.  I'm reasonably certain that this is due to problems in the dark model.
=== Chris Waters ===