The vmbias recipe
===============================================================

.. data:: vmbias

Synopsis
--------

Create a master bias from set of raw bias frames.

Description
-----------

This recipe is used to create a master bias frame from a set of raw
bias frames.


Input files
^^^^^^^^^^^^
::

  DO category:  Type:       Explanation:     Required:
  BIAS          Raw         Bias exposure       Y
  CCD_TABLE     Calib       Bad pixel table     .


Output files
^^^^^^^^^^^^
::

  DO category:  Data type:  Explanation:
  MASTER_BIAS   FITS image  Master bias

A CCD table must be specified only if a bad pixel cleaning is
requested.


For more details, please refer to the VIMOS Pipeline User's Guide.


Constructor
-----------

.. method:: cpl.Recipe("vmbias")
   :noindex:

   Create an object for the recipe vmbias.

::

   import cpl
   vmbias = cpl.Recipe("vmbias")

Parameters
----------

.. py:attribute:: vmbias.param.AllowSingleFrames

    Frame combination method is ignored. (bool; default: True) [default=True].
.. py:attribute:: vmbias.param.StackMethod

    Frame combination method (str; default: 'Median') [default="Median"].
.. py:attribute:: vmbias.param.KSigmaLow

    Low threshold for K-sigma clipping method (float; default: 5.0) [default=5.0].
.. py:attribute:: vmbias.param.KSigmaHigh

    High threshold for K-sigma clipping method (float; default: 5.0) [default=5.0].
.. py:attribute:: vmbias.param.MinRejection

    Number of lowest rejected values for rejection method (int; default:  1) [default=1].
.. py:attribute:: vmbias.param.MaxRejection

    Number of highest rejected values for rejection method (int; default:  1) [default=1].
.. py:attribute:: vmbias.param.RemoveOverscan

    Remove overscan regions from master bias (bool; default: True) [default=True].
.. py:attribute:: vmbias.param.CleanBadPixel

    Bad pixel correction on master bias (bool; default: False) [default=False].
.. py:attribute:: vmbias.param.CleanCosmic

    Cosmic ray removal from each raw bias (bool; default: False) [default=False].
.. py:attribute:: vmbias.param.ComputeQC

    Compute QC1 parameters (bool; default: True) [default=True].


The following code snippet shows the default settings for the available 
parameters.

::

   import cpl
   vmbias = cpl.Recipe("vmbias")

   vmbias.param.AllowSingleFrames = True
   vmbias.param.StackMethod = "Median"
   vmbias.param.KSigmaLow = 5.0
   vmbias.param.KSigmaHigh = 5.0
   vmbias.param.MinRejection = 1
   vmbias.param.MaxRejection = 1
   vmbias.param.RemoveOverscan = True
   vmbias.param.CleanBadPixel = False
   vmbias.param.CleanCosmic = False
   vmbias.param.ComputeQC = True


You may also set or overwrite some or all parameters by the recipe 
parameter `param`, as shown in the following example:

::

   import cpl
   vmbias = cpl.Recipe("vmbias")
   [...]
   res = vmbias( ..., param = {"AllowSingleFrames":True, "StackMethod":"Median"})


.. seealso:: `cpl.Recipe <https://packages.python.org/python-cpl/recipe.html>`_
   for more information about the recipe object.

Bug reports
-----------

Please report any problems to `ESO VIMOS Pipeline Team <https://support.eso.org>`_. Alternatively, you may 
send a report to the `ESO User Support Department <usd-help@eso.org>`_.

Copyright
---------

This file is part of the VIMOS Instrument Pipeline
Copyright (C) 2002-2005 European Southern Observatory

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; either version 2 of the License, or
(at your option) any later version.

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 St, Fifth Floor, Boston, MA  02110-1301  USA


.. codeauthor:: ESO VIMOS Pipeline Team <https://support.eso.org>