Add notebook example

doc/howtos.rst

@@ -73,7 +73,11 @@ toolbox source. This files can then be loaded and combined with:
 DSSC azimuthal integration
 ##########################
 
-*To be documented*.
+Azimuthal integration can be performed with pyFAI_ which can utilize the
+hexagonal pixel shape information from the DSSC geometry to correctly split
+the intensity in a pixel in the bins covered by it. An example notebook
+:doc:`Azimuthal integration of DSSC with pyFAI <Azimuthal integration of DSSC with pyFAI>` is available.
+
 
 Legacy DSSC binning procedure
 #############################
@@ -143,3 +147,5 @@ Detectors that produce one point per pulse, or 0D detectors, are all handled in
 
 * :doc:`extract data from point detectors <point_detectors/point_detectors>`.
 
+
+.. _pyFAI: https://pyfai.readthedocs.io