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<div class="section" id="photometry-dialog">
<span id="index-0"></span><span id="id1"></span><h1>Photometry dialog<a class="headerlink" href="#photometry-dialog" title="Permalink to this headline">¶</a></h1>
<p>The “Photometry” dialog is used to start the photometry process. The photometry takes the calibrated
working copy of the source frames, detects the objects and measures their brightness and other parameters.
Results are stored to separate files, which are called photometry files.</p>
<div class="section" id="activating-the-dialog">
<h2>Activating the dialog<a class="headerlink" href="#activating-the-dialog" title="Permalink to this headline">¶</a></h2>
<p>The dialog can be activated:</p>
<ol class="arabic simple">
<li>from the main menu: <em class="menuselection">Reduce ‣ Photometry</em>.</li>
<li>from the main toolbar: <img alt="photometry_icon" src="_images/photometry.png" /></li>
</ol>
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<div class="section" id="running-photometry">
<h2>Running photometry<a class="headerlink" href="#running-photometry" title="Permalink to this headline">¶</a></h2>
<p>Any frame calibration steps (bias, dark, flat and time correction) must be applied before the photometry.</p>
<div class="figure align-center">
<img alt="Photometry dialog" src="_images/photometry_couts.png" />
<p class="caption">The dialog for starting the photometry</p>
</div>
<p>(1) It is possible to apply the operation either on all source files in the project or
on the files that are currently selected in the table of input files. This option is useful
when you are finding the ideal values of the photometry settings. It is strongly recommended
to use a single set of settings for all frames in a set.</p>
<p>Click the “Execute” button (2) to start the operation.</p>
<ul class="simple">
<li>All calibrations (bias, dark, flat and time correction) must be applied before the photometry.</li>
<li>The photometry can be applied several times, the old photometry files are overwritten.</li>
</ul>
<div class="admonition-see-also admonition seealso">
<p class="first admonition-title">See also</p>
<p class="last"><a class="reference internal" href="match_stars_dialog.html#match-stars-dialog"><em>Match stars (dialog)</em></a>, <a class="reference internal" href="express_reduction_dialog.html#express-reduction-dialog"><em>Express reduction (dialog)</em></a></p>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Photometry dialog</a><ul>
<li><a class="reference internal" href="#activating-the-dialog">Activating the dialog</a></li>
<li><a class="reference internal" href="#running-photometry">Running photometry</a></li>
</ul>
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