Components represent the sky brightness as a function of position on the sky and observing frequency. The main tool in this module is the componentlist tool which provides functions for manipulating groups of components.
Components are a complimentary alternative to representing the sky brightness with an image.
Often residual errors from these bright features prevent the detection or analysis of the weak features. Imaging under these circumstances is difficult and often the user must resort to modeling the sky brightness to reduce the number of free parameters and incorporate additional prior information. This tool can generate componentlists by fitting to specified regions of an image. Component Description Components have a number of properties which can be categorised as relating to either its flux, shape or spectrum. A fundamental property of a component is its flux or integrated intensity 1.1 .