Residual offset › Forums › Spectroscopy › Model-based Interpretation of Cepheid spectra › Residual offset 14 November 2019 at 9:23 pm #581600 Kevin GurneyParticipant The ‘systemic velocity’ is included in the orbital component in the model so, theoretically, I have already subtracted it. I was happy just to get something that was roughly sinusoidal and not too bady offset from zero! Kevin
