The model includes Galactic diffuse, isotropic diffuse, and IC443:
<source name="Galactic_Diffuse_ext"> <spectrum escale="MeV"> <SpectrumClass name="MapCube" params="1e3, galdif_extended.fits"/> <use_spectrum frame="galaxy"/> </spectrum> </source> <source name="Isotropic_Diffuse"> <spectrum escale="MeV"> <SpectrumClass name="IsotropicFileSpectrum" params="flux=800, specFile=iso_p7v6source_extrapolated.txt"/> <use_spectrum frame="galaxy"/> </spectrum> </source> <source name="IC443"> <spectrum escale="MeV"> <SpectrumClass name="FileSpectrumMap" params="flux=10.,fitsFile=IC443.fits,specFile=IC443_sbpl.txt,emin=10,emax=1e6"/> <use_spectrum frame="galaxy"/> </spectrum> </source> |
This yields ratios of numbers of events within a nominal 14 degree radius cone about IC 443 of Galactic:Isotropic:IC443 = 10:1:10 for the energy range 20-5000 MeV.
The data were analyzed for three subselections:
<?xml version="1.0" standalone="no"?> <source_library title="source library"> <source name="IC443" type="DiffuseSource"> <spectrum type="SmoothBrokenPowerLaw"> <parameter error="0.4954398855" free="1" max="100" min="0.01" name="Prefactor" scale="1e-6" value="1" /> <parameter error="0.1215327591" free="1" max="5" min="-5" name="Index1" scale="1" value="-0.5" /> <parameter free="0" max="200" min="200" name="Scale" scale="1" value="200" /> <parameter error="0.02281532475" free="1" max="5" min="-5" name="Index2" scale="1" value="-1.9" /> <parameter error="21.72157285" free="1" max="1000" min="100" name="BreakValue" scale="1" value="250" /> <parameter free="0" max="0.1" min="0.1" name="Beta" scale="1" value="0.1" /> </spectrum> <spatialModel file="IC443.fits" type="SpatialMap"> <parameter free="0" max="1000" min="0.001" name="Prefactor" scale="1" value="1" /> </spatialModel> </source> <source name="Galactic Diffuse" type="DiffuseSource"> <spectrum type="PowerLaw"> <parameter error="0.002799883743" free="1" max="1e4" min="0." name="Prefactor" scale="1" value="50" /> <parameter error="0.003039083563" free="1" max="1" min="-1" name="Index" scale="-1" value="0.0" /> <parameter free="0" max="1000" min="1000" name="Scale" scale="1" value="1000" /> </spectrum> <spatialModel file="galdif_extended.fits" type="MapCubeFunction"> <parameter free="0" max="1000" min="0.001" name="Normalization" scale="1" value="1" /> </spatialModel> </source> <source name="Isotropic Diffuse" type="DiffuseSource"> <spectrum file="iso_p7v6source_extrapolated.txt" type="FileFunction"> <parameter error="0.01269613352" free="1" max="1e4" min="0" name="Normalization" scale="1" value="10." /> </spectrum> <spatialModel type="ConstantValue"> <parameter free="0" max="10" min="0" name="Value" scale="1" value="1" /> </spatialModel> </source> </source_library> |