Spectrophotometry using an intensifier silicon vidicon.

A spectrometer has been assembled from a small-grating spectrograph and a commercially available intensifier silicon vidicon detector system. The spectrometer exhibits stability of response and linearity suitable for spectrophotometry and evidence is presented that spectrophotometric accuracy (within i 0.01 magnitude) is achieved even on nights of low quality. A spectrum of such quality of the Of star 9 Sge is presented. The absolute photometry of Kuan and Kuhi (1976) obtained for several points in the spectral region 420-560 nm has been used for calibration and allows absolute measurements of line strengths to be made. Key words: spectrophotometry-intensifier silicon vidicon