Index: trunk/psModules/src/objects/models/pmModel_GAUSS.c
===================================================================
--- trunk/psModules/src/objects/models/pmModel_GAUSS.c	(revision 6905)
+++ trunk/psModules/src/objects/models/pmModel_GAUSS.c	(revision 6907)
@@ -35,33 +35,4 @@
 }
 
-psF64 pmModelFlux_GAUSS(const psVector *params)
-{
-    psF64 A1   = PS_SQR(params->data.F32[4]);
-    psF64 A2   = PS_SQR(params->data.F32[5]);
-    psF64 A3   = PS_SQR(params->data.F32[6]);
-    psF64 Area = 2.0 * M_PI / sqrt(A1*A2 - A3);
-    // Area is equivalent to 2 pi sigma^2
-
-    psF64 Flux = params->data.F32[1] * Area;
-
-    return(Flux);
-}
-
-// return the radius which yields the requested flux
-psF64 pmModelRadius_GAUSS  (const psVector *params, psF64 flux)
-{
-
-    if (flux <= 0)
-        return (1.0);
-    if (params->data.F32[1] <= 0)
-        return (1.0);
-    if (flux >= params->data.F32[1])
-        return (1.0);
-
-    psF64 sigma  = sqrt(2.0) * hypot (1.0 / params->data.F32[4], 1.0 / params->data.F32[5]);
-    psF64 radius = sigma * sqrt (2.0 * log(params->data.F32[1] / flux));
-    return (radius);
-}
-
 // define the parameter limits
 bool pmModelLimits_GAUSS (psVector **beta_lim, psVector **params_min, psVector **params_max)
@@ -76,5 +47,5 @@
 
     beta_lim[0][0].data.F32[0] = 1000;
-    beta_lim[0][0].data.F32[1] = 10000;
+    beta_lim[0][0].data.F32[1] = 3e6;
     beta_lim[0][0].data.F32[2] = 5;
     beta_lim[0][0].data.F32[3] = 5;
@@ -92,5 +63,5 @@
 
     params_max[0][0].data.F32[0] = 1e5;
-    params_max[0][0].data.F32[1] = 1e6;
+    params_max[0][0].data.F32[1] = 1e8;
     params_max[0][0].data.F32[2] = 1e4;  // this should be set by image dimensions!
     params_max[0][0].data.F32[3] = 1e4;  // this should be set by image dimensions!
@@ -117,4 +88,34 @@
     params[6] = 0.0;
     return(true);
+}
+
+psF64 pmModelFlux_GAUSS(const psVector *params)
+{
+    psF64 A1   = PS_SQR(params->data.F32[4]);
+    psF64 A2   = PS_SQR(params->data.F32[5]);
+    psF64 A3   = PS_SQR(params->data.F32[6]);
+    psF64 Area = 2.0 * M_PI / sqrt(A1*A2 - A3);
+    // Area is equivalent to 2 pi sigma^2
+
+    psF64 Flux = params->data.F32[1] * Area;
+
+    return(Flux);
+}
+
+// return the radius which yields the requested flux
+// this function is never allowed to return <= 0
+psF64 pmModelRadius_GAUSS  (const psVector *params, psF64 flux)
+{
+
+    if (flux <= 0)
+        return (1.0);
+    if (params->data.F32[1] <= 0)
+        return (1.0);
+    if (flux >= params->data.F32[1])
+        return (1.0);
+
+    psF64 sigma  = sqrt(2.0) * hypot (1.0 / params->data.F32[4], 1.0 / params->data.F32[5]);
+    psF64 radius = sigma * sqrt (2.0 * log(params->data.F32[1] / flux));
+    return (radius);
 }