Index: trunk/psModules/src/objects/pmSource.h
===================================================================
--- trunk/psModules/src/objects/pmSource.h	(revision 29546)
+++ trunk/psModules/src/objects/pmSource.h	(revision 30621)
@@ -35,4 +35,5 @@
     PM_SOURCE_TMPF_SIZE_CR_CANDIDATE = 0x0008,
     PM_SOURCE_TMPF_MOMENTS_MEASURED  = 0x0010,
+    PM_SOURCE_TMPF_CANDIDATE_PSFSTAR = 0x0020,
 } pmSourceTmpF;
 
@@ -42,4 +43,16 @@
  *  simplest measurement of a source is the location and flux of the peak pixel
  *  associated with the source:
+ *
+ * a pmSource is the information about a (possible) blob of flux in a specific image.  A source
+ * may represent an insignificant or undetected source.  There may be multiple representations
+ * of an image (eg, alternate smoothed copies); sources on alternate images may have a pointer
+ * to the version on the primary image (source->parent).  A set of sources on different, but
+ * related images (eg, multiple exposures or different filters) which (may) represent the same
+ * astronomical object are grouped together with the pmPhotObj type (set pmPhotObj.h).
+ * 
+ * A single source may be fitted with multiple models (not at the same time!).  The PSF model
+ * fit is a fit of the position (optionally) and the flux to the PSF model at the location of
+ * the source.  Alternate model fits are extended source models. The best model fit is used to
+ * subtract the object from the image.
  *
  *  XXX do I have to re-organize this (again!) to allow an arbitrary set of extended model fits??
@@ -54,9 +67,9 @@
     pmPeak  *peak;                      ///< Description of peak pixel.
     psImage *pixels;                    ///< Rectangular region including object pixels.
-    psImage *variance;                    ///< Image variance.
+    psImage *variance;			///< Image variance.
     psImage *maskObj;                   ///< unique mask for this object which marks included pixels associated with objects.
     psImage *maskView;                  ///< view into global image mask for this object region
     psImage *modelFlux;                 ///< cached copy of the best model for this source
-    psImage *psfImage;                   ///< cached copy of the psf model for this source
+    psImage *psfImage;			///< cached copy of the psf model for this source
     pmMoments *moments;                 ///< Basic moments measured for the object.
     pmModel *modelPSF;                  ///< PSF Model fit (parameters and type)
@@ -89,5 +102,6 @@
     pmSourceExtendedPars *extpars;      ///< extended source parameters
     pmSourceDiffStats *diffStats;       ///< extra parameters for difference detections
-    pmSourceRadialApertures *radial;	///< radial flux in circular apertures
+    psArray *radialAper;		///< radial flux in circular apertures
+    pmSource *parent;			///< reference to the master source from which this is derived
     int imageID;
 };
@@ -162,4 +176,10 @@
 );
 
+bool pmSourceRedefinePixelsByRegion (
+    pmSource *mySource,   ///< source to be re-defined
+    const pmReadout *readout,   ///< base the source on this readout
+    psRegion newRegion ///< region for source pixel definition
+);
+
 /** pmSourcePSFClump()
  *