heliocentric and telluric correction

Forums Spectroscopy Request for monitoring of X Per heliocentric and telluric correction

Robin Leadbeater

A reminder that spectra to BeSS standard normally do not have telluric lines removed or  heliocentric corrections applied so it is important to make these corrections before comparing them.  (I remember seeing a poster by a professional which claimed to show features moving in a line profile which were in fact due to telluric lines in heliocentric corrected spectra !)