The Simkin effect

Abstract

The Simkin (1977) effect is discussed for Steward Observatory spectrogram measurements and shown by K-H residuals and comparisons with other redshift sources, including sky-substracted values, probably not to exceed 30 km/s. Large effects are, however, shown to exist in Kintner (1971) and other redshift sources – up to + or – 400 km/s – while the Humason, Mayall, and Sandage (1956) redshifts appear to be unaffected. The effect that is seen appears to be explained entirely by 4047-A mercury interference and to be virtually independent of galaxy magnitude. Such interference cannot explain redshift-magnitude bands in either form or amount of shift.

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