Class ThermalSpectralElement

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The ThermalSpectralElement class handles spectral elements that have associated thermal properties read from a FITS table.

ThermalSpectralElements differ from regular SpectralElements in that they carry thermal parameters such as temperature and beam filling factor, but otherwise they operate just as regular SpectralElements. They dont know how to apply themselves to an existing beam, in the sense that their emissivities should be handled explictly, outside the objects themselves.