wpolycoeff

popurri.spectrum.wpolycoeff(filin, kwinst='HIERARCH ESO', nord=72)

From e2ds header FITS file get the polynomial coefficients necessary to transform from pixels to wavelength.

Parameters:

filinstr or astropy header object (astropy.io.fits.header.Header)

FITS file from which to read the header or astropy header object (faster if header already loaded before).