Index: trunk/ppStack/src/ppStackSources.c
===================================================================
--- trunk/ppStack/src/ppStackSources.c	(revision 18355)
+++ trunk/ppStack/src/ppStackSources.c	(revision 18356)
@@ -7,4 +7,5 @@
 #define SOURCE_MASK (PM_SOURCE_MODE_FAIL | PM_SOURCE_MODE_DEFECT | PM_SOURCE_MODE_SATURATED | \
                      PM_SOURCE_MODE_CR_LIMIT) // Mask to apply to input sources
+#define SOURCE_FAINTEST 50.0            // Faintest magnitude to consider
 #define SOURCES_MAX_LEAF 2              // Maximum number of points on a tree leaf
 
@@ -68,5 +69,6 @@
     for (long i = 0; i < numSources; i++) {
         pmSource *source = sources->data[i]; // Source of interest
-        if (!source || (source->mode & SOURCE_MASK) || !isfinite(source->psfMag) || source->psfMag == 99.0) {
+        if (!source || (source->mode & SOURCE_MASK) || !isfinite(source->psfMag) ||
+            source->psfMag > SOURCE_FAINTEST) {
             continue;
         }