diff --git a/python_tools/void_python_tools/voidUtil/__init__.py b/python_tools/void_python_tools/voidUtil/__init__.py
index 189dfa2..f90294d 100644
--- a/python_tools/void_python_tools/voidUtil/__init__.py
+++ b/python_tools/void_python_tools/voidUtil/__init__.py
@@ -21,3 +21,6 @@
 from catalogUtil import *
 from plotDefs import *
 from plotUtil import *
+from matchUtil import *
+from xcorUtil import *
+from profileUtil import *
diff --git a/python_tools/void_python_tools/voidUtil/catalogUtil.py b/python_tools/void_python_tools/voidUtil/catalogUtil.py
index 2c676cb..3374105 100644
--- a/python_tools/void_python_tools/voidUtil/catalogUtil.py
+++ b/python_tools/void_python_tools/voidUtil/catalogUtil.py
@@ -215,6 +215,7 @@ class Catalog:
   numVoids = 0
   numPartTot = 0
   numZonesTot = 0
+  volNorm = 0
   boxLen = np.zeros((3))
   part = None
   zones2Parts = None
@@ -327,6 +328,7 @@ def loadVoidCatalog(sampleDir, dataPortion="central", loadPart=True):
     partData, boxLen, volNorm, isObservationData, ranges = loadPart(sampleDir)
     numPartTot = len(partData)
     catalog.numPartTot = numPartTot
+    catalog.volNorm = volNorm
     catalog.partPos = partData
     catalog.part = []
     for i in xrange(len(partData)):
diff --git a/python_tools/void_python_tools/voidUtil/matchUtil.py b/python_tools/void_python_tools/voidUtil/matchUtil.py
index 8222f21..ef39dae 100755
--- a/python_tools/void_python_tools/voidUtil/matchUtil.py
+++ b/python_tools/void_python_tools/voidUtil/matchUtil.py
@@ -18,7 +18,7 @@
 #   with this program; if not, write to the Free Software Foundation, Inc.,
 #   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 #+
-
+__all__=['compareCatalogs',]
 
 from void_python_tools.backend import *
 import imp
diff --git a/python_tools/void_python_tools/voidUtil/profileUtil.py b/python_tools/void_python_tools/voidUtil/profileUtil.py
new file mode 100644
index 0000000..d0cb31f
--- /dev/null
+++ b/python_tools/void_python_tools/voidUtil/profileUtil.py
@@ -0,0 +1,118 @@
+#+
+#   VIDE -- Void IDentification and Examination -- ./python_tools/void_python_tools/plotting/plotTools.py
+#   Copyright (C) 2010-2013 Guilhem Lavaux
+#   Copyright (C) 2011-2013 P. M. Sutter
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; version 2 of the License.
+# 
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program; if not, write to the Free Software Foundation, Inc.,
+#   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#+
+__all__=['buildProfile','fitHSWProfile','getHSWProfile',]
+
+from void_python_tools.backend.classes import *
+from plotDefs import *
+import numpy as np
+import os
+import void_python_tools.apTools as vp
+from scipy.optimize import curve_fit
+from scipy.interpolate import interp1d
+
+def HamausProfile(r, rs, dc):
+  alpha = -2.0*rs + 4.0
+  if rs < 0.91:
+    beta = 17.5*rs - 6.5
+  else:
+    beta = -9.8*rs + 18.4
+  return dc * (1 - (r/rs)**alpha) / (1+ (r)**beta) + 1
+
+# -----------------------------------------------------------------------------
+def buildProfile(catalog, rMin, rMax):
+
+# builds a stacked radial density profile from the given catalog
+#   catalog: void catalog
+#   rMin: minimum void radius, in Mpc/h
+#   rMax: maximum void radius, in Mpc/h
+#
+# returns:
+#   binCenters: array of radii in binned profile
+#   stackedProfile: the stacked density profile
+#   sigmas: 1-sigma uncertainty in each bin
+
+  rMaxProfile = rMin*3 + 2
+  periodicLine = getPeriodic(catalog.sampleInfo)
+
+  print "  Building particle tree..."
+  partTree = getPartTree(catalog)
+
+  print "  Selecting voids to stack..."
+  accepted = (catalog.voids[:].radius > rMin) & (catalog.voids[:].radius < rMax)
+  voidsToStack = catalog.voids[accepted]
+
+  print "  Stacking voids..."
+  allProfiles = []
+  for void in voidsToStack:
+    center = void.barycenter
+    
+    localPart = catalog.partData[ getBall(partTree, center, rMaxProfile) ]
+    shiftedPart = shiftPart(localPart, center, periodicLine, catalog.ranges)
+
+    dist = np.sqrt(np.sum(shiftedPart[:,:]**2, axis=1))
+    thisProfile, radii = np.histogram(dist, bins=nBins, range=(0,rMaxProfile))
+    deltaV = 4*np.pi/3*(radii[1:]**3-radii[0:(radii.size-1)]**3)
+    thisProfile = np.float32(thisProfile)
+    thisProfile /= deltaV
+    thisProfile /= catalog.volNorm
+    allProfiles.append(thisProfile)
+    binCenters = 0.5*(radii[1:] + radii[:-1])
+
+  stackedProfile = np.std(allProfiles, axis=0) / np.sqrt(nVoids)
+  sigmas = np.std(allProfiles, axis=0) / np.sqrt(nVoids)
+  
+  return binCenters, stackedProfile, sigmas
+
+
+# -----------------------------------------------------------------------------
+def fitHSWProfile(radii, densities, sigmas):
+
+# fits the given density profile to the HSW function
+#   radii: array of radii in r/rV
+#   densities: array of densities
+#   sigmas: array of uncertainties
+# 
+# returns:
+#   popt: best-fit values of dc and rs
+#   pcov: covariance matrix
+
+  popt, pcov = curve_fit(HamausProfile, radii, densities,
+                         sigma=sigmas)
+                         maxfev=10000, xtol=5.e-3,
+                         p0=[1.0,-1.0])
+
+  return popt, pcov
+
+
+# -----------------------------------------------------------------------------
+def getHSWProfile(den, radius):
+
+# returns the HSW profile for the given sample density and void size
+# (interpolated from best-fit values)
+#  density: density of sample
+#  radius: void size in Mpc/h
+
+# returns:
+#   binCenters: array of radii in binned profile
+#   stackedProfile: the density profile
+
+  sample = catalog.sampleInfo
+  data = catalog.voids[:].radius
+
diff --git a/python_tools/void_python_tools/voidUtil/xcorUtil.py b/python_tools/void_python_tools/voidUtil/xcorUtil.py
index c0e8609..bad91fe 100644
--- a/python_tools/void_python_tools/voidUtil/xcorUtil.py
+++ b/python_tools/void_python_tools/voidUtil/xcorUtil.py
@@ -39,8 +39,6 @@
 #+
 
 from void_python_tools.backend import *
-from void_python_tools.plotting import *
-import void_python_tools.xcor as xcorlib
 import imp
 import pickle
 import argparse
@@ -55,6 +53,7 @@ from matplotlib import rc
 from matplotlib.ticker import NullFormatter
 import random
 import sys
+__all__=['computeCrossCor',]
 
 # ------------------------------------------------------------------------------