.. C-Munipack - User's manual

   Copyright 2012 David Motl

   Permission is granted to copy, distribute and/or modify this document under the
   terms of the GNU Free Documentation License, Version 1.2 or any later version published
   by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and
   no Back-Cover Texts.

   $Id: find_variables_dialog.rst,v 1.2 2012/09/01 12:47:00 dmotl Exp $

.. index::
   pair: Find variables; dialog

.. _find-variables-dialog:

Find variables (dialog)
=======================

The "Find variables" dialog is used to find objects that significantly change their
brightness.


Activating the dialog
---------------------

The dialog can be activated:

.. |varfind_icon| image:: ../../share/icons/varfind.png

#. from the main menu: :menuselection:`Tools --> Find variables`.

#. from the main toolbar: |varfind_icon|


.. index::
   triple: finding; variable; stars

Finding variable stars
----------------------

.. figure:: images/varfind_couts.png
   :align: center
   :alt: Find variables dialog
   
   The dialog for finding new variable stars
   
\(1) The mag-dev graph is presented here. Each point in the graph
corresponds to an object. The comparison star is not shown. Left click
on a mag-dev graph to select a star. It is highlighted and its light curve
is shown below (2).

\(3) Position of the variable star and the comparison star are marked on the
chart. Left click on a chart to select a star. It is highlighted and its light
curve is shown below (2).

\(4) Single left click on a chart or graph marks the stars as a variable star
or a comparison star according to the current selection mode.

\(5) You can change the current aperture by means of this selection field.

Click the "Save chart" button (6) to save the chart to a file.

Click the "Save light curve" button (7) to save the light curve to a file.

\(8) The local menu bar provides following functions:

- Menu File:

  - Save all data - exports magnitudes of all stars for all source frames to a single file.
  
  - Save mag-dev curve - exports table with mag-dev curve to a text file.
  
  - Save chart - save the chart to a file.
  
  - Save light curve - save the light curve to a file.
  
  - Close - close this window
  
- Menu View:

  - Image only - show only CCD image (if available) and hide objects.
  
  - Chart only - show only objects and hide the CCD image.
  
  - Chart and image - show CCD image on the background and objects as an overlay.
  

.. seealso:: :ref:`finding-variables`, :ref:`choose-stars-dialog`, :ref:`light-curve-dialog`
