shift_by_offset
- jwst.extract_1d.extract.shift_by_offset(offset, extract_params, update_trace=True)[source]
Shift the nominal extraction parameters by a pixel offset.
Start, stop, and polynomial coefficient values for source and background are updated in place in the
extract_paramsdictionary. The source trace value, if present, is also updated if desired.- Parameters:
- offsetfloat
Cross-dispersion offset to apply, in pixels.
- extract_paramsdict
Extraction parameters to update, as created by
get_extraction_parameters.- update_tracebool
If True, the trace in
extract_params['trace']is also updated if present.