Index: trunk/psModules/src/objects/pmSource.h
===================================================================
--- trunk/psModules/src/objects/pmSource.h	(revision 15707)
+++ trunk/psModules/src/objects/pmSource.h	(revision 15799)
@@ -3,6 +3,6 @@
  * @author EAM, IfA; GLG, MHPCC
  *
- * @version $Revision: 1.19 $ $Name: not supported by cvs2svn $
- * @date $Date: 2007-11-10 01:09:20 $
+ * @version $Revision: 1.20 $ $Name: not supported by cvs2svn $
+ * @date $Date: 2007-12-13 04:05:58 $
  * Copyright 2004 Maui High Performance Computing Center, University of Hawaii
  */
@@ -81,5 +81,5 @@
     float apMag;                        ///< apMag corresponding to psfMag or extMag (depending on type)
     float pixWeight;                    ///< model-weighted coverage of valid pixels
-    float psfProb;                      ///< probability of PSF
+    float psfChisq;                      ///< probability of PSF
     float crNsigma;                     ///< Nsigma deviation from PSF to CR
     float extNsigma;                    ///< Nsigma deviation from PSF to EXT
Index: trunk/psModules/src/objects/pmSourceIO_PS1_DEV_1.c
===================================================================
--- trunk/psModules/src/objects/pmSourceIO_PS1_DEV_1.c	(revision 15707)
+++ trunk/psModules/src/objects/pmSourceIO_PS1_DEV_1.c	(revision 15799)
@@ -3,6 +3,6 @@
  *  @author EAM, IfA
  *
- *  @version $Revision: 1.5 $ $Name: not supported by cvs2svn $
- *  @date $Date: 2007-11-10 01:09:20 $
+ *  @version $Revision: 1.6 $ $Name: not supported by cvs2svn $
+ *  @date $Date: 2007-12-13 04:05:58 $
  *
  *  Copyright 2004 Maui High Performance Computing Center, University of Hawaii
@@ -111,5 +111,5 @@
         psMetadataAdd (row, PS_LIST_TAIL, "SKY_SIGMA",        PS_DATA_F32, "Sigma of sky level",                         source->skyErr);
 
-        psMetadataAdd (row, PS_LIST_TAIL, "PSF_PROBABILITY",  PS_DATA_F32,  "Probability of PSF-ness",                   source->psfProb);
+        psMetadataAdd (row, PS_LIST_TAIL, "PSF_CHISQ",        PS_DATA_F32,  "Chisq of PSF-fit to top 9 pixels",          source->psfChisq);
         psMetadataAdd (row, PS_LIST_TAIL, "CR_NSIGMA",        PS_DATA_F32,  "Nsigma deviations from PSF to CF",          source->crNsigma);
         psMetadataAdd (row, PS_LIST_TAIL, "EXT_NSIGMA",       PS_DATA_F32,  "Nsigma deviations from PSF to EXT",         source->extNsigma);
@@ -235,5 +235,6 @@
         source->pixWeight = psMetadataLookupF32 (&status, row, "PSF_QF");
 
-        source->psfProb   = psMetadataLookupF32 (&status, row, "PSF_PROBABILITY");
+	// note that some older versions used PSF_PROBABILITY: this was not well defined.
+        source->psfChisq  = psMetadataLookupF32 (&status, row, "PSF_CHISQ");
         source->crNsigma  = psMetadataLookupF32 (&status, row, "CR_NSIGMA");
         source->extNsigma = psMetadataLookupF32 (&status, row, "EXT_NSIGMA");