H alpha variations in two mass losing stars

The authors report quite preliminary results obtained with a new multichannel detector put into operation at the Haute Provence Observatory. The observations have been made at the Cassegrain focus of the 1.93 m. The dispersion of the spectrograph was 17 A.mm-1 at Hsub(α) and the slit was 300 μ wide. The detector was a cooled SIT TV camera tube commercially available under the name of 'Nocticon'. The wavelengths are recorded simultaneously. The stars observed are HD 60848 and BD+4004220. (Auth.)