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In this brief note I draw attention to the structure of the stationary Halphaline as a function of orbital phase, using a data set compiled over some years.These data are compared with a set of nightly observations over some 2 orbits.The structures are very similar and this is highly relevant to the question ofpersistence and stability of spectral features which have been attributed to acircumbinary disk.

On Purple Mountain Halpha observations of SS 433