Reduction Module (cwitools.reduction)

The reduction module contains functions used in order to prepare data for analysis. This includes cropping, coadding, correcting coordinate systems, and correcting variance estimates. Since it is quite a large module, it is broken down further into four sub-modules:

Cubes

Functions applied or related directly do data cubes, such as re-binning, cropping, or coadding.

Units

Functions related to unit corrections, currently consisting of an air-to-vacuum wavelength correction and a heliocentric wavelength correction.

WCS

Functions for correcting the world-coordinate system (WCS) of the pipeline data cubes. This is done either in absolute terms, by fitting to a known feature, or in relative terms, by cross-correlating the input data and making them at least self-consistent.

Variance

Functions for estimating variance empirically, scaling variance estimates, and measuring the effects of covariance in the data.