shift_ref_image
- jwst.extract_1d.ifu.shift_ref_image(mask, delta_y, delta_x, fill=0)[source]
Apply source position offset to target or background for ref image.
- Parameters:
- maskndarray
This is either the 2D or 3D target mask or background mask, which was created from an image EXTRACT1D reference file. It is assumed that all pixels in the science data are good. If that is not correct, this function may be called with a data quality array as the first argument, in order to obtain a shifted data quality array. In this case,
fillshould be set to a positive value, e.g., 1.- delta_y, delta_xint
These are the shifts to be applied to the vertical and horizontal axes respectively.
- fillint or float
The output array will be initialized to this value. This should be 0 (the default) if
maskis a target or background mask, but it should be set to 1 (or some other positive value) ifmaskis a data quality array.
- Returns:
- tempndarray
A copy of
mask, but shifted bydelta_yanddelta_x.