diff --git a/doc/source/reference_manual/csspec.rst b/doc/source/reference_manual/csspec.rst
new file mode 100644
index 0000000..35fc34c
--- /dev/null
+++ b/doc/source/reference_manual/csspec.rst
@@ -0,0 +1,129 @@
+.. _csspec:
+
+csspec
+======
+
+Computes spectrum for a given source.
+
+
+Synopsis
+--------
+
+Computes spectral points for a given source.
+
+
+General parameters
+------------------
+
+``(inobs = NONE) [file]``
+    Input event list, counts cube or observation definition XML file.
+
+``inmodel [file]``
+    Input source model XML file.
+
+``srcname [string]``
+    Name of the source in the source model XML file which should be used
+    for sensitivity computation.
+
+``outfile [file]``
+    Name of the source spectrum output file.
+
+``expcube [file]``
+    Exposure cube file (only needed for stacked analysis).
+
+``psfcube [file]``
+    PSF cube file (only needed for stacked analysis).
+
+``bkgcube [file]``
+    Background cube file (only needed for stacked analysis).
+
+``caldb [string]``
+    Calibration database.
+ 	 	 
+``irf [string]``
+    Instrumental response function.
+
+``emin [real]``
+    Lower energy limit of events (in TeV).
+ 	 	 
+``emax [real]``
+    Upper energy limit of events (in TeV).
+ 	 	 
+``enumbins [integer]``
+    Number of energy bins (0=unbinned).
+ 	 	 
+``(ebinalg = LOG) <FILE|LIN|LOG> [string]``
+    Algorithm for defining energy bins.
+ 	 	 
+``binned [boolean]``
+    Specifies whether a binned computation should be used.
+
+``(nebins = 5) [integer]``
+    Number of bins per spectral point for binned analysis.
+
+``coordsys <CEL|GAL> [string]``
+    Coordinate system (CEL - celestial, GAL - galactic).
+ 	 	 
+``proj <AIT|AZP|CAR|MER|MOL|STG|TAN> [string]``
+    Projection method.
+
+``xref [real]``
+    Right Ascension / Galactic longitude of image centre (J2000, in degrees).
+ 	 	 
+``yref [real]``
+    Declination / Galactic latitude of image centre (J2000, in degrees).
+
+``nxpix [integer]``
+    Size of the Right Ascension / Galactic longitude axis (in pixels).
+ 	 	 
+``nypix [integer]``
+    Size of the Declination / Galactic latitude axis (in pixels).
+ 	 	 
+``binsz [real]``
+    Pixel size (in degrees/pixel).
+ 	 	 
+``(calc_ts = yes) [boolean]``
+    Compute TS for each spectral point.
+
+``(calc_ulim = yes) [boolean]``
+    Compute upper limit for each spectral point.
+
+``(fix_srcs = yes) [boolean]``
+    Fix other sky model parameters.
+
+``(fix_bkg = no) [boolean]``
+    Fix background parameters.
+
+
+Standard parameters
+-------------------
+
+``(chatter = 2) [integer]``
+    Verbosity of the executable:
+     chatter = 0: no information will be logged
+     
+     chatter = 1: only errors will be logged
+     
+     chatter = 2: errors and actions will be logged
+     
+     chatter = 3: report about the task execution
+     
+     chatter = 4: detailed report about the task execution
+ 	 	 
+``(clobber = yes) [boolean]``
+    Specifies whether an existing output counts cube should be overwritten.
+ 	 	 
+``(debug = no) [boolean]``
+    Enables debug mode. In debug mode the executable will dump any log file output to the console.
+ 	 	 
+``(mode = ql) [string]``
+    Mode of automatic parameters (default is "ql", i.e. "query and learn").
+
+``(logfile = csspec.log) [filename]``
+    Log filename.
+
+
+Related tools
+-------------
+
+None
diff --git a/doc/source/reference_manual/index.rst b/doc/source/reference_manual/index.rst
index eccacb8..189b711 100644
--- a/doc/source/reference_manual/index.rst
+++ b/doc/source/reference_manual/index.rst
@@ -40,5 +40,6 @@ cscripts
    csobsdef --- Generates observation definition file <csobsdef>
    cspull --- Generates pull distribution <cspull>
    cssens --- Computes CTA sensitivity <cssens>
+   csspec --- Computes spectral points <csspec>
    csresmap --- Generates residual map <csresmap>
    cstsdist --- Generates TS distribution <cstsdist>