cwitools.utils.get_specres¶
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cwitools.utils.
get_specres
(hdr)¶ Get the approximate spectral resolution based on the header
The returned values for various KCWI settings are taken from the estimates on KCWI’s home page at keck.edu. PCWI returns R = 2000 for the Richardson grating and R = 5000 for all others.
Parameters: hdr (astropy FITS Header) – The header Returns: The spectral resolution, R for the grating/slicer used. Return type: float Raises: ValueError
– If grating or slicer name is not recognized