Step ArgumentsΒΆ
The background image subtraction step has two optional arguments, both of
which are used only when the step is applied to non-WFSS exposures.
They are used in the process of creating an average background image, to
control the sigma clipping, and are passed as arguments to the astropy
sigma_clip
function:
--sigma
- The number of standard deviations to use for the clipping limit. Defaults to 3.
--maxiters
- The number of clipping iterations to perform, or
None
to clip until convergence is achieved. Defaults toNone
.