GammaLib

<?xml version="1.0" standalone="no"?>

<source_library title="source library">

  <source name="OrionB" type="DiffuseSource">

    <spectrum type="PowerLaw">

      <parameter scale="0.13814844749121282e+20" name="Prefactor" min="1e-30" max="1e+3" value="3.16282e-30" free="1"/>

      <parameter scale="1.0"   name="Index"     min="-3.0" max="-1.0" value="-2.73625" free="1"/>    

      <parameter scale="1.0"   name="Scale"     min="1e+3" max="1e+8" value="1e+3" free="1"/>

    </spectrum>

    <spatialModel type="SpatialMap" file="co_OriB.fits">

          <parameter scale="1" name="Prefactor" min="1e-3" max="1e+3" value="1" free="0" />

        </spatialModel>

  </source>

  <source name="Background" type="RadialAcceptance" instrument="CTA">

    <spectrum type="FileFunction" file="bkg_kb_I_50h_v3.txt">

      <parameter scale="1.0" name="Normalization" min="0.0" max="1000.0" value="1.0" free="1"/>

    </spectrum>

    <radialModel type="Gaussian">

       <parameter name="Sigma" scale="1.0" value="3.0" min="0.01" max="10.0" free="1"/>

    </radialModel>

  </source>

</source_library>