IPP Progress Report for the week 2012.02.26 - 2012.03.04

(Up to IPP Progress Reports)

Eugene Magnier

Serge Chastel

• Off on Tue afternoon
• Sick on Friday
• Raw images files in Nebulous: Raw Images Files in Nebulous

Heather Flewelling

Roy Henderson

• 2-day week (3 days of vacation)

• some big code changes to ippToPsps so that different clients load by RA stripe:
  • new database tables where each client 'registers' the stripe it is working on
  • code changes to support database changes
  • introduced more cascading delete constraints so that dying clients remove all foreign-key related rows in other tables

• some work on cleaning up PSPS public wiki
• started new 'configmaker' program to make ippToPsps config creation and alteration easier
• continued to load and monitor LAP/3PI data

Mark Huber

Bill Sweeney

• Spent the week debugging psphotStack problems and building tools to help that effort.
  • Made some refinements to dlapstacks (display LAP stacks) a tool for finding and displaying LAP stack images that contain a point on the sky. Did some virtual sky gazing looking at various NGC galaxies. Some of the larger ones really show the effect of bad background correction. The newer stacks are improved in this regard.
  • The primary problem with psphotStack is that it often tries to consume infinite memory. Since psphot is quite complex I spent two full days reading code and stepping through the program. For the example case (sky_id 138369) the memory is being used by images created for each of the sources. With some effort discovered that this happens because a bit of code is calculating an unreasonably large size for the source. This caused the kron code to allocate very large images - many larger than the input image! Correcting the calculation stopped the explosion in this case. It is quite likely this is the general cause of the memory over consumption.
• Debugged a distribution problem that NCU ran into.

Chris Waters