This task uses information from the spectral fit of a limited region of the detector and from the full field-of-view to scale the fitted SP normalization of the limited region to be appropriate for the full FOV. This is useful for the case where bright diffuse emission in part of the FOV may be affecting the SP spectral fit, in many clusters of galaxies for example. This task was originally a subtask of the SAS esas task named sp_partial prior to SAS-21 and retains all of its functionality.
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