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zap_parameters Overview

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Attribute nameAttribute typeDocstringUnit
cftypestrThe type of filtering that is applied to remove the continuum. "weight" refers to the weighted median, which uses the calculated zlevel sky as the weight. "median" refers to a rolling median filter with a nested small uniform filter. The weight option provides a better result, but is much slower (an additional 10 minutes on a single exposure) and should only be run in the complete sky subtraction case.
cfwidthSPfloatWindow size for the continuum filter used to remove the continuum features for calculating the eigenvalues per spectrum. Smaller values better trace the sources. An optimal range of is typically 20 - 50 pixels.
cfwidthSVDfloatWindow size for the continuum filter, for the SVD computation.
cleanintNaN correction, this is a boolean set to True as default
extSVDstrAn optional parameter that allows the input of a externally calculated eigenbasis as well as a zlevel.
maskstr(only used with the SVDoutput method) A 2D fits image to exclude regions that may contaminate the zlevel or eigenspectra.
n_componentsintno description available
ncpuintno description available
nevalsfloatnumber of eigenspectra per, list of the number of eigenvals to include, set as 0 by default
object_idoidtypeThe object identifier

The object identifier is an attribute shared by all persistent
instances. It is the prime key, by which object identity is established
pca_classstrno description available
skycubefitsstrdescription todo
varcurvefitsstrPath for the optional output of the explained variance curves.
zlevelstrThis option is used to define the method for determining the zeroth order subtraction of the sky. This is used to remove any systematic sky feature that exists over the whole field. Options are median, sigclip, and none. The none option should only be applied when ZAP is applied to enhance a previous sky subtraction.

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