Changes between Version 4 and Version 5 of IPP_Progress_Report_20091005

Timestamp:

Oct 12, 2009, 8:08:18 AM (17 years ago)

Author:

eugene

Comment:

--

IPP_Progress_Report_20091005

@@ -8 +8 @@
 This week, my goal was to start the re-processing of data taken in Run 3 & Run 4 with the upgrades to stacking, photometry, including the flat-field correction & y-band fringe corrections.  Although we have had enough tests of the upgraded processing, work has been going a bit slower than hoped on the two detrend issues (flat-field and y-band fringes).  While these were being worked on, we have been running more processing of data that had been collected just before the end of Run 4.  This included a complete sweep through the 'SVS' data (the MOPS ecliptic-plane r-band data), with detections shipped to MOPS Tuesday and Wednesday.  We also have processed the MD and M31 data taken in the last week before the shutdown.
 
-On my side, I've been working on the flat-field correction analysis.  Last weekend, I had processed the images taken for the flat-field correction.  However, over the summer we re-organized part of the pipeline to better handle the DVO ingest process, defining a new 'addstar' analysis stage.  I needed to make some changes to the flat-field correction analysis system to interact with this new addstar system, and I also found some errors in the implementation of the addstar stages.  I also updated the flat-field correction system to distinguish between an analysis to generate a flat-field correction and one which tests the flat-field correction (these have slightly different behavior on completion).  We now have flat-field corrections for gizy, and corresponding corrected flats for Run 3 & Run 4, and I have run the tests using those flats on the input data sets (still running as of Sunday 4pm).  The r-band data is waiting for me to fix a minor logic error in the analysis database queries. 
+On my side, I've been working on the flat-field correction analysis.  Last weekend, I had processed the images taken for the flat-field correction.  However, over the summer we re-organized part of the pipeline to better handle the DVO ingest process, defining a new 'addstar' analysis stage.  I needed to make some changes to the flat-field correction analysis system to interact with this new addstar system, and I also found some errors in the implementation of the addstar stages.  I also updated the flat-field correction system to distinguish between an analysis to generate a flat-field correction and one which tests the flat-field correction (these have slightly different behavior on completion).  We now have flat-field corrections for gizy, and corresponding corrected flats for Run 3 & Run 4, and I have run the tests using those flats on the input data sets (still running as of Sunday 4pm).  The r-band data had a minor logic error in the analysis database queries, but is running and should be done on Monday.  I have also performed the flattest analysis on the input data, in which we apply the corrected flat to the data and measure the residual correction.  I have only performed this measurement on the data used to construct the flat-field correction, so this is not yet a complete test of the system.  However, it shows the internal consistency of the photometry.  The results are extremely promising: I fit a Gaussian to the set of flat-field correction values, and the sigmas of those Gaussian fits are: (g,i,z,y) = (2.2, 1.8, 1.7, 2.5) milli-mags. 
 
 === Heather Flewelling ===