Index: trunk/psModules/src/objects/pmModel.h
===================================================================
--- trunk/psModules/src/objects/pmModel.h	(revision 30621)
+++ trunk/psModules/src/objects/pmModel.h	(revision 31153)
@@ -33,4 +33,5 @@
     psVector *params;                   ///< Paramater values.
     psVector *dparams;                  ///< Parameter errors.
+    psImage *covar;                     ///< Optional covariance matrix
     float chisq;                        ///< Fit chi-squared.
     float chisqNorm;                    ///< re-normalized fit chi-squared.
@@ -38,5 +39,6 @@
     float magErr;                       ///< integrated model magnitude error
     int nPix;                           ///< number of pixels used for fit
-    int nDOF;                           ///< number of degrees of freedom
+    int nPar;                           ///< number of parameters in fit
+    int nDOF;                           ///< number of degrees of freedom (nDOF = nPix - nPar)
     int nIter;                          ///< number of iterations to reach min
     pmModelStatus flags;                ///< model status flags