sky_model_to_remove

sitelle.fit.sky_model_to_remove(mean_spectrum, axis, sky_axis, sky_model)

This function shifts the velocity of a skymodel to match at best the skylines in a spectrum. It returns the fitted vector, that should be then subtracted from the original spectrum.

Parameters:
  • mean_spectrum (1D ndarray) – The spectrum containing skylines. If it comes from an integrated region, pay attention to give the mean spectrum, i.e divided by the number of integrated pixels
  • axis (1D ndarray) – Axis of the spectrum [cm-1]
  • sky_axis (1D ndarray) – Axis on which the skymodel is known [cm-1]
  • skymodel (1D ndarray) – Sky spectrum to be fitted
Returns:

shifted_spectrum – The shifted sky spectrum, to be removed
Return type:

ndarray