diff --git a/doc/source/users/reference_manual/ctselect.rst b/doc/source/users/reference_manual/ctselect.rst
index 34f6fb8..84ec751 100644
--- a/doc/source/users/reference_manual/ctselect.rst
+++ b/doc/source/users/reference_manual/ctselect.rst
@@ -85,13 +85,12 @@ General parameters
     If INDEF, NONE, UNDEF or UNDEFINED is passed as value, no energy
     selection will be performed.
  	 	 
-``(phasemin = 0.0) [real]``
-    Lower phase limit of events.
-    If INDEF, NONE, UNDEF or UNDEFINED is passed as value, no phase
-    selection will be performed.
- 	 	 
-``(phasemax = 1.0) [real]``
-    Upper phase limit of events.
+``(phase = NONE) [string]``
+    String to apply a phase selection. The string must contain the boundaries 
+    of the phase interval to be selected separated be a colon. More than one
+    interval can be specified at the same time. In this case intervals must be 
+    separated by a comma. Examples of valid strings are: phase = "0.3:0.6" or
+    phase = "0.3:0.6,0.8:0.9". 
     If INDEF, NONE, UNDEF or UNDEFINED is passed as value, no phase
     selection will be performed.
  	 	 
diff --git a/test/test_ctselect.py b/test/test_ctselect.py
index 7b135c3..480ecaa 100755
--- a/test/test_ctselect.py
+++ b/test/test_ctselect.py
@@ -357,6 +357,28 @@ class Test(test):
         # Check result file
         self._check_result_file('ctselect_py10.fits', nevents=0, dec=-22.01, rad=5.0)
 
+        # Now test phase cut
+        select = ctools.ctselect()
+        select['inobs']   = os.path.dirname(self._events)+"/phased_"+os.path.basename(self._events)
+        select['ra']      = 83.63
+        select['dec']     = 22.01
+        select['rad']     = 5.
+        select['tmin']    = "INDEF"
+        select['tmax']    = "INDEF"
+        select['emin']    = 0.1
+        select['emax']    = 100.0
+        select['phase']   = "0.1:0.4,0.6:0.8"
+        select['outobs']  = 'ctselect_py11.fits'
+        select['logfile'] = 'ctselect_py11.log'
+        select['chatter'] = 2
+
+        # Run ctselect tool
+        select.logFileOpen()   # Make sure we get a log file
+        select.execute()
+
+        # Check result file
+        self._check_result_file('ctselect_py11.fits', nevents=3159, dec=22.01, rad=5.)
+
         # Return
         return