Index: trunk/psphot/src/psphotRoughClass.c
===================================================================
--- trunk/psphot/src/psphotRoughClass.c	(revision 36375)
+++ trunk/psphot/src/psphotRoughClass.c	(revision 42842)
@@ -198,5 +198,9 @@
         }
 
-        psfClump = pmSourcePSFClump (NULL, region, sources, PSF_SN_LIM, PSF_CLUMP_GRID_SCALE, MOMENTS_SX_MAX, MOMENTS_SY_MAX, MOMENTS_SX_MIN, MOMENTS_SY_MIN, MOMENTS_AR_MAX);
+	// use clipped stats or robust stats to define the clump
+	bool PSF_CLUMP_USE_CLIPPED_STATS = psMetadataLookupF32(&status, recipe, "PSF_CLUMP_USE_CLIPPED_STATS");
+	if (!status) { PSF_CLUMP_USE_CLIPPED_STATS = true; }
+
+        psfClump = pmSourcePSFClump (NULL, region, sources, PSF_SN_LIM, PSF_CLUMP_GRID_SCALE, MOMENTS_SX_MAX, MOMENTS_SY_MAX, MOMENTS_SX_MIN, MOMENTS_SY_MIN, MOMENTS_AR_MAX, PSF_CLUMP_USE_CLIPPED_STATS);
 
         psMetadataAddF32 (regionMD, PS_LIST_TAIL, "PSF.CLUMP.X",  PS_META_REPLACE, "psf clump center", psfClump.X);