Action #607

Updated by Knödlseder Jürgen over 11 years ago

To properly fit COMPTEL data, the background handling is required.

COMPTEL background can be provided by so called DRB files, and the background model consists then of fit factors that are applied to the DRB cube.

COMPTEL background can also be derived from the data itself, and the background model consists then of parameters used for background modeling.

For example, for fitting a single normalization factor to the background model on could use the following XML file:
<pre>
<source name="Background" type="DRBFitting" instrument="COM">
<phibar>
<parameter name="Normalization" scale="1.0" value="1.0" min="0.0" max="1000.0" free="1"/>
<parameter name="LowerLimit" scale="1.0" value="0.0" min="0.0" max="50.0" free="0"/>
<parameter name="UpperLimit" scale="1.0" value="50.0" min="0.0" max="50.0" free="0"/>
</phibar>
</source>
</pre>
and for fitting two Phibar layers one could use
<pre>
<source name="Background" type="DRBFitting" instrument="COM">
<phibar>
<parameter name="Normalization" scale="1.0" value="1.0" min="0.0" max="1000.0" free="1"/>
<parameter name="LowerLimit" scale="1.0" value="0.0" min="0.0" max="50.0" free="0"/>
<parameter name="UpperLimit" scale="1.0" value="25.0" min="0.0" max="50.0" free="0"/>
</phibar>
<phibar>
<parameter name="Normalization" scale="1.0" value="1.0" min="0.0" max="1000.0" free="1"/>
<parameter name="LowerLimit" scale="1.0" value="25.0" min="0.0" max="50.0" free="0"/>
<parameter name="UpperLimit" scale="1.0" value="50.0" min="0.0" max="50.0" free="0"/>
</phibar>
</source>
</pre>

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