| Abstract: | A computer controlled measuring procedure is presented ascertaining intensity courses. The procedure is capable for measurement and storage of the transmittance of photographic spectrograms and for the determination of residual intensities derived from a mean local continum. Residual intensity courses obtained from several spectrograms can be superimposed and correlated with wavelength scale. The method was applied to eight weakly or not reddened early type stars in order to obtain data on atomic lines in the central part of the diffuse interstellar line at 4430 Å. The results show the general influence of the stellar portion on the central depth and equivalent width of the whole diffuse feature. |
