Index: trunk/Ohana/src/opihi/mana/deimos_fitobj.c
===================================================================
--- trunk/Ohana/src/opihi/mana/deimos_fitobj.c	(revision 40643)
+++ trunk/Ohana/src/opihi/mana/deimos_fitobj.c	(revision 40644)
@@ -205,7 +205,7 @@
     // new concept: start with 2-sigma range, then ramp down below
     for (int iy = 0; iy < Nrow; iy++) {
-      objNoise[iy] = 2*hypot(sqrt(fabs(objVal[iy + row]) / gain), noiseVar);
-      skyNoise[iy] = 2*hypot(sqrt(fabs(skyVal[iy + row]) / gain), noiseVar);
-      bckNoise[iy] = 2*hypot(sqrt(fabs(bckVal[iy + row]) / gain), noiseVar);
+      objNoise[iy] = 2*sqrt(hypot(fabs(objVal[iy + row]) / gain, noiseVar));
+      skyNoise[iy] = 2*sqrt(hypot(fabs(skyVal[iy + row]) / gain, noiseVar));
+      bckNoise[iy] = 2*sqrt(hypot(fabs(bckVal[iy + row]) / gain, noiseVar));
     }