title: The use of a cascade intensifier in coudé spectroscopy.
abstract: An image intensifier system centered round a four-stage cascade intensifier, EMI type 9694, is described, the image being recorded by a moving plate camera. Astronomical observations were made on the coudé spectrograph of a 30-in. (76-cm) telescope; the dispersion in the blue was 3 A mm(-1). The system was found to be capable of spectrophotometry, the limiting stellar magnitude being 9, and showed considerable gains over alternative techniques in high time resolution observations.
authors.affiliation: Oxford University Department of Astrophysics.
authors.forename: A V
authors.initials: AV
authors.lastname: Hewitt
authors.forename: W N
authors.initials: WN
authors.lastname: Charman