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- We begin by extracting the 3EG sources within a specified acceptance cone on the sky:\\\\
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A dialog window pops up in which we specify the acceptance cone parameters, source catalog and output file name.\\\\
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The acceptance cone we choose has angular radius 20 degrees and is centered on the Galactic
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- anticenter. The source catalogs that this application
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- is able to read are in the format used by the flux package.
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- The default is the version of the 3EG catalog that was prepared for DC1. The flux limit is in the same units of flux used in the xml file.
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- For point sources used by the flux package, flux values are in units of photons m -2 s -1 \\\\
- A list of the extracted sources appears in the list box on the left. Selection of a source in this list box cause the source model components and parameter values to be displayed in the list boxes on the right. \\\\
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If desired, one can change the name of the source by editing its name in entry box on the upper right side:\\\\
\\\\ - Model components for the spectral and spatial parts of the source can be changed via the pull-down menues associated with each component. Here we choose a broken power-law for modeling the Crab.\\\\
\\\\ - To edit any parameter value, just double-left-click on that parameter in the list box and a dialog window will pop-up giving access to all of the attributes associated with that parameter.\\\\
