Index: /trunk/psphot/src/psphotPSFConvModel.c
===================================================================
--- /trunk/psphot/src/psphotPSFConvModel.c	(revision 32630)
+++ /trunk/psphot/src/psphotPSFConvModel.c	(revision 32631)
@@ -43,5 +43,5 @@
     // adjust the pixels based on the footprint
     float radius = psphotSetRadiusEXT (readout, source, markVal);
-    if (!pmSourceMoments (source, radius, 0.0, 0.0, maskVal)) return false;
+    if (!pmSourceMoments (source, radius, 0.25*radius, 0.0, maskVal)) return false;
 
     // XXX test : modify the Io, SXX, SYY terms based on the psf SXX, SYY terms: