Changes between Version 52 and Version 53 of Sa10Problems

Timestamp:

Dec 13, 2012, 9:34:52 AM (14 years ago)

Author:

eugene

Comment:

--

Sa10Problems

@@ -103 +103 @@
     * a. This is a known issue and not to be resolved yet (why?) WES: A proposal was made to fix the stackMeta.skycellID but there are PSPS validation issues that must be worked out and no one has had the time to investigate. I think it involves creating an init batch with every possible value of skycell id.
   *  B5. psflikelihood: why <0 for 10% of the stackdetections and -999 for ~25% of the stackdetections 
-    * a. ?  '''Gene???'''
+    * a. '''EAM : note the definition from wiki:ippToPsps_Stack : sign(EXT_NSIGMA)*erfc(abs(EXT_NSIGMA) / sqrt(2)).  the value is negative if EXT_NSIGMA is in the direction of objects smaller than a PSF'''
 * C. PSPS flags: 
  *  C1. objectxflags: what does ID_SECF_HAS_STACK correspond to: forced photometry on the stack if set? Not clear why it should indicate whether there is a stack photometry as if there isn't any, then the corresponding photometry column should be set to -999