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Welcome to Sherpa's documentation
=================================

.. image:: _static/sherpa_logo.png
    :width: 350px
    :height: 132px
    :target: http://cxc.harvard.edu/contrib/sherpa/

.. warning::

   This is an *experimental build* of the Sherpa documentation. The
   information presented here is not guaranteed to be correct or
   complete.

Welcome to the Sherpa documentation.
`Sherpa <http://cxc.harvard.edu/contrib/sherpa/>`_
is a Python package for
modeling and fitting data. It was originally developed by the
`Chandra X-ray Center <http://cxc.harvard.edu/>`_ for use in
`analysing X-ray data (both spectral and imaging)
<http://cxc.harvard.edu/sherpa>`_
from the  Chandra X-ray telescope, but it is designed to be a
general-purpose package, which can be enhanced with domain-specific
tasks (such as X-ray Astronomy).
Sherpa contains an expressive and powerful
modeling language, coupled with a
range of statistics and robust optimisers.

Sherpa is released under the
`GNU General Public License v3.0
<https://github.com/sherpa/sherpa/blob/master/LICENSE>`_,
and is compatible with Python versions 2.7, 3.5, and 3.6. 
Information on recent releases and citation information for
Sherpa is available using the Digital Object Identifier (DOI) 
`10.5281/zenodo.593753 <https://doi.org/10.5281/zenodo.593753>`_.

.. toctree::
   :maxdepth: 2
   :caption: Introduction
   :name: intro

   install
   quick
   ciao

.. toctree::
   :maxdepth: 2
   :caption: User Documentation
   :name: user_docs

   data/index
   models/index
   evaluation/index
   model_classes/index
   statistics/index
   optimisers/index
   fit/index
   plots/index
   mcmc/index
   overview/utilities

.. toctree::
   :maxdepth: 2
   :caption: Worked Examples
   :name: worked_examples

   examples/simple_interpolation
   examples/simple_user_model

.. toctree::
   :maxdepth: 2
   :caption: An interactive application
   :name: ui

   ui/index

.. toctree::
   :maxdepth: 2
   :caption: Getting Help
   :name: help_docs

   bugs
   development
   indices
      
At present there is no developer mailing list for Sherpa.