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FluxFrame - Measured flux description

Description:
A FluxFrame is a specialised form of one-dimensional Frame which represents various systems used to represent the signal level in an observation. The particular coordinate system to be used is specified by setting the FluxFrame's System attribute qualified, as necessary, by other attributes such as the units, etc (see the description of the System attribute for details).

All flux values are assumed to be measured at the same frequency or wavelength (as given by the SpecVal attribute). Thus this class is more appropriate for use with images rather than spectra.

Constructor Function:
astFluxFrame
Inheritance
The FluxFrame class inherits from the Frame class.
Attributes
In addition to those attributes common to all Frames, every FluxFrame also has the following attributes:

  • SpecVal: The spectral position at which the flux values are measured.
Functions
The FluxFrame class does not define any new functions beyond those which are applicable to all Frames.


next up previous 264
Next: Frame - Coordinate system description
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council