diff --git a/pipeline/datasets/example_observation.py b/pipeline/datasets/example_observation.py
index f84a964..73462f9 100644
--- a/pipeline/datasets/example_observation.py
+++ b/pipeline/datasets/example_observation.py
@@ -79,18 +79,21 @@ newSample = Sample(
                    # don't change this
                    dataType = "observation",
 
+                   # assume volume-limites?
+                   volumeLimited = True,
+
                    # HEALpix mask file
                    maskFile = inputDataDir+"/healpix/rast_window_512.fits",
 
+                   # radial selection function (if not volume limited)
+                   selFunFile = None,
+
                    # max and min redshifts of galaxies in your sample
                    zBoundary = (0.0, 0.05),
 
                    # max and min redshifts where you want to find voids
                    zRange = (0.0, 0.05),
  
-                   # TODO 
-                   skyFraction = 0.19,
-
                    # leave this at -1 for mean particle separation, or 
                    # specify your own in Mpc/h
                    minVoidRadius = -1,
diff --git a/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py b/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
index d66b3c6..5a3bf5d 100644
--- a/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
+++ b/python_tools/void_python_tools/apTools/profiles/getSurveyProps.py
@@ -25,19 +25,23 @@ import void_python_tools as ct
 __all__=['getSurveyProps']
    
 # returns the volume and galaxy density for a given redshit slice
-def getSurveyProps(maskFile, zmin, zmax, selFunMin, selFunMax, portion, selectionFuncFile=None, useLCDM=False):
+def getSurveyProps(maskFile, zmin, zmax, selFunMin, selFunMax, portion, selectionFuncFile=None, useComoving=False):
 
   LIGHT_SPEED = 299792.458
 
   mask = healpy.read_map(maskFile)
   area = (1.*np.size(np.where(mask > 0)) / np.size(mask)) * 4.*np.pi
 
-  if useLCDM:
+  if useComoving:
     zmin = LIGHT_SPEED/100.*ct.angularDiameter(zmin, Om=0.27)
     zmax = LIGHT_SPEED/100.*ct.angularDiameter(zmax, Om=0.27)
+    selFunMin = LIGHT_SPEED/100.*ct.angularDiameter(selFunMin, Om=0.27)
+    selFunMax = LIGHT_SPEED/100.*ct.angularDiameter(selFunMax, Om=0.27)
   else:
     zmin = zmin * 3000
     zmax = zmax * 3000
+    selFunMin *= 3000
+    selFunMax *= 3000
   volume = area * (zmax**3  - zmin**3) / 3
 
   if selectionFuncFile != None:
@@ -51,9 +55,6 @@ def getSurveyProps(maskFile, zmin, zmax, selFunMin, selFunMax, portion, selectio
     selfuncDx = selfunc[1,0] - selfunc[0,0]
     selfuncN = np.size(selfunc[:,0])
   
-    selFunMin *= 3000
-    selFunMax *= 3000
-  
     selFunMin = max(selFunMin, selfuncMin)
     selFunMax = min(selFunMax, selfuncMax)
   
@@ -67,7 +68,6 @@ def getSurveyProps(maskFile, zmin, zmax, selFunMin, selFunMax, portion, selectio
     nbar = nbar[0]
   
     ntotal = scipy.integrate.quad(fTotal, 0.0, max(selfuncUnity[:,0]))
-    #ntotal = scipy.integrate.quad(f, 0.0, max(selfunc[:,0]))
     ntotal = ntotal[0]
   
     nbar = ntotal / area / nbar
diff --git a/python_tools/void_python_tools/backend/classes.py b/python_tools/void_python_tools/backend/classes.py
index 1101a41..fb1efbf 100644
--- a/python_tools/void_python_tools/backend/classes.py
+++ b/python_tools/void_python_tools/backend/classes.py
@@ -68,7 +68,6 @@ class Sample:
   zobovDir = ""
   maskFile = "rast_window_512.fits"
   selFunFile = "czselfunc.all.dr72dim.dat"
-  skyFraction = 0.19
   zBoundary = (0.0, 0.1)
   zBoundaryMpc = (0., 300)
   zRange    = (0.0, 0.1)
@@ -101,7 +100,7 @@ class Sample:
                minVoidRadius=-1, fakeDensity=0.01, volumeLimited=True,
                numAPSlices=1,
                includeInHubble=True, partOfCombo=False, isCombo=False, 
-               comboList=(), profileBinSize=2.0, skyFraction=0.19,
+               comboList=(), profileBinSize=2.0,
                boxLen=1024, usePecVel=False, omegaM=0.27, 
                numSubvolumes=1, mySubvolume=1, dataFormat="sdss",
                useComoving=True,
@@ -126,7 +125,6 @@ class Sample:
     self.numAPSlices = numAPSlices
     self.zobovDir = None
     self.profileBinSize = profileBinSize
-    self.skyFraction = skyFraction
     self.dataType = dataType
     self.boxLen = boxLen
     self.usePecVel = usePecVel
diff --git a/python_tools/void_python_tools/backend/launchers.py b/python_tools/void_python_tools/backend/launchers.py
index 60f3359..4b38260 100644
--- a/python_tools/void_python_tools/backend/launchers.py
+++ b/python_tools/void_python_tools/backend/launchers.py
@@ -269,7 +269,7 @@ def launchGenerate(sample, binPath, workDir=None, inputDataDir=None,
   numTracers = int(open(zobovDir+"/mask_index.txt", "r").read())
   numTotal = int(open(zobovDir+"/total_particles.txt", "r").read())
  
-  meanSep = (1.*numTracers/boxVol)**(-1/3.) 
+  meanSep = (1.*numTracers/boxVol/nbar)**(-1/3.) 
 
   # save this sample's information
   with open(zobovDir+"/sample_info.dat", 'w') as output:
diff --git a/python_tools/void_python_tools/voidUtil/catalogUtil.py b/python_tools/void_python_tools/voidUtil/catalogUtil.py
index b1d3caa..ba7b1e5 100644
--- a/python_tools/void_python_tools/voidUtil/catalogUtil.py
+++ b/python_tools/void_python_tools/voidUtil/catalogUtil.py
@@ -106,7 +106,8 @@ def loadPart(sampleDir):
                                 sample.zBoundary[1], 
                                 sample.zBoundary[0], 
                                 sample.zBoundary[1], "all",
-                                useLCDM=sample.useComoving)
+                                selectionFuncFile=sample.selFunFile,
+                                useComoving=sample.useComoving)
       boxVol = props[0]
       volNorm = maskIndex/boxVol
     else:
@@ -156,7 +157,8 @@ def getVolNorm(sampleDir):
                                 sample.zBoundary[1], 
                                 sample.zBoundary[0], 
                                 sample.zBoundary[1], "all",
-                                useLCDM=sample.useComoving)
+                                selectionFuncFile=sample.selFunFile,
+                                useComoving=sample.useComoving)
       boxVol = props[0]
       volNorm = maskIndex/boxVol
     else: