H-beta spectrophotometry of SX Phe.

Summary. A new way to use the ESO Spectrum Scanner is described. The method provides light-curves at the continuum and line center of H-beta and equivalent with curves automatically. Observations of SX Phe show a pre- and post-maximum hump in the equivalent width curve previously undetected in ordinary H-beta photometry Key words: H-beta spectrophotometry SX Phe pulsation