Index: trunk/ippTools/src/stacktool.c
===================================================================
--- trunk/ippTools/src/stacktool.c	(revision 34586)
+++ trunk/ippTools/src/stacktool.c	(revision 34731)
@@ -1006,4 +1006,6 @@
     PXOPT_LOOKUP_STR(ver_streaks, config->args, "-ver_streaks", false, false);
 
+    PXOPT_LOOKUP_S16(background_model, config->args, "-background_model", false, false);
+    
     psTrace("czw.test",1,"Received versions: pslib %s psmodules %s psphot %s ppstats %s ppstack %s streaks %s\n",
             ver_pslib,ver_psmodules,ver_psphot,ver_ppstats,ver_ppstack,ver_streaks);
@@ -1067,4 +1069,5 @@
                                fault,
                                software_ver,
+			       background_model,
                                quality
           )) {
@@ -1121,5 +1124,5 @@
     PXOPT_COPY_F64(config->args, where, "-mjd_obs_begin", "stackSumSkyfile.mjd_obs", ">=");
     PXOPT_COPY_F64(config->args, where, "-mjd_obs_end", "stackSumSkyfile.mjd_obs", "<=");
-
+    PXOPT_COPY_S16(config->args, where, "-background_model","stackSumSkyfile.background_model", "==");
 
 //  The following three selectors are incompatible with the sql so omit them