Index: trunk/psphot/src/psphotOutput.c
===================================================================
--- trunk/psphot/src/psphotOutput.c	(revision 13808)
+++ trunk/psphot/src/psphotOutput.c	(revision 16250)
@@ -149,4 +149,6 @@
     psMetadataItemSupplement (header, recipe, "MSKY_NY");
 
+    psMetadataAddF32 (header, PS_LIST_TAIL, "DT_PHOT", PS_META_REPLACE, "elapsed psphot time", psTimerMark ("psphotReadout"));
+
     // XXX : don't require any of these about values to exist
     psErrorClear ();