Index: /trunk/psphot/src/psphotMagnitudes.c
===================================================================
--- /trunk/psphot/src/psphotMagnitudes.c	(revision 11311)
+++ /trunk/psphot/src/psphotMagnitudes.c	(revision 11312)
@@ -19,11 +19,11 @@
     assert(background != NULL);
     assert(background->analysis != NULL);
-    int DX = psMetadataLookupS32(&status, background->analysis, "XBIN");
+    int DX = psMetadataLookupS32(&status, background->analysis, "PSPHOT.BACKGROUND.XBIN");
     assert (status == true);
-    int DY = psMetadataLookupS32(&status, background->analysis, "YBIN");
+    int DY = psMetadataLookupS32(&status, background->analysis, "PSPHOT.BACKGROUND.YBIN");
     assert (status == true);
-    int dx = psMetadataLookupS32(&status, background->analysis, "x0");
+    int dx = psMetadataLookupS32(&status, background->analysis, "PSPHOT.BACKGROUND.XOFF");
     assert (status == true);
-    int dy = psMetadataLookupS32(&status, background->analysis, "y0");
+    int dy = psMetadataLookupS32(&status, background->analysis, "PSPHOT.BACKGROUND.YOFF");
     assert (status == true);