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The Petrova (2000) model to calculate pulse profiles is extended to avariable emission height model to make it physically self-consistent. In thiscontext variable means that the emission height is no longer considered to bethe same for different magnetic field lines. The pulse profiles calculatedusing this new model seem to be less realistic due to a focusing effect andcannot be used to fit (typical) multifrequency pulsar observations. Apart fromthe focusing effect the general morphology of pulse profiles is not greatlyaffected by introducing a variable emission height. Additional extensions ofthe model will be needed to be able to fit observations, and severalsuggestions are made.Comment: 7 pages, 5 figures, accepted to A&

Refraction in a pulsar magnetosphere – the effect of a variable emission height on pulse morphology