GammaLib

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<source_library title="source library">

  <source name="Crab" type="PointSource">

    <spectrum type="PowerLaw">

      <parameter name="Prefactor" scale="1e-17" value="5.7" min="1e-3" max="1000" free="1" />

      <parameter name="Index" scale="-1" value="3" min="0" max="5" free="1" />

      <parameter name="Scale" scale="1e6" value="1" min="0.01" max="1000" free="0" />

    </spectrum>

    <spatialModel type="SkyDirFunction">

      <parameter name="RA" scale="1.0" value="83.6331" min="-360" max="360" free="1" />

      <parameter name="DEC" scale="1.0" value="22.0145" min="-90" max="90" free="1" />

    </spatialModel>

  </source>

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

    <spectrum type="NodeFunction">

      <node>

        <parameter scale="1e6" name="Energy" min="1.0" max="1.4" value="1.2" free="0" />

        <parameter scale="1e-01" name="Intensity" min="1.0e-05" max="1.0e+05" value="6.0" free="1" />

      </node>

      <node>

        <parameter scale="1e6" name="Energy" min="1.4" max="2.1" value="1.8" free="0" />

        <parameter scale="1e-01" name="Intensity" min="1.0e-05" max="1.0e+05" value="2.2" free="1" />

      </node>

      <node>

        <parameter scale="1e6" name="Energy" min="2.1" max="3.1" value="2.6" free="0" />

        <parameter scale="1e-02" name="Intensity" min="1.0e-05" max="1.0e+05" value="7.7" free="1" />

      </node>

      <node>

        <parameter scale="1e6" name="Energy" min="3.1" max="4.5" value="3.8" free="0" />

        <parameter scale="1e-02" name="Intensity" min="1.0e-05" max="1.0e+05" value="2.8" free="1" />

      </node>

    </spectrum>

        <radialModel type="Gaussian">

      <parameter name="Sigma" value="1" scale="1" min="0.001" max="1000" free="1" />

    </radialModel>

  </source>

</source_library>