Index: /branches/eam_branches/20091201/Ohana/src/opihi/cmd.astro/mkgauss.c
===================================================================
--- /branches/eam_branches/20091201/Ohana/src/opihi/cmd.astro/mkgauss.c	(revision 26461)
+++ /branches/eam_branches/20091201/Ohana/src/opihi/cmd.astro/mkgauss.c	(revision 26462)
@@ -11,5 +11,6 @@
   Buffer *buf;
 
-  Xo = Yo = 0;
+  // this should be Nx/2, Ny/2 if not set
+  Xo = Yo = NAN;
   if ((N = get_argument (argc, argv, "-c"))) {
     remove_argument (N, &argc, argv);
@@ -30,4 +31,7 @@
   Ny = buf[0].header.Naxis[1];
   
+  if (isnan(Xo)) Xo = Nx / 2;
+  if (isnan(Yo)) Yo = Ny / 2;
+
   /* gaussian parameters */
   Sig_x = atof (argv[2]);