Index: trunk/ppSim/src/ppSimInsertStars.c
===================================================================
--- trunk/ppSim/src/ppSimInsertStars.c	(revision 41331)
+++ trunk/ppSim/src/ppSimInsertStars.c	(revision 41397)
@@ -163,4 +163,9 @@
 	source->sky = skyFlux;
 
+	// mark the externally supplied stars:x
+	if (star->external) {
+	  source->mode2 |= PM_SOURCE_MODE2_MATCHED;
+	}
+
 	// add the sources to the source array
 	psArrayAdd (sources, 100,source);