Uniformity of UKSTU Photographic Plates
- 1 January 1980
- journal article
- other
- Published by Cambridge University Press (CUP) in Publications of the Astronomical Society of Australia
- Vol. 4 (4) , 466-468
- https://doi.org/10.1017/s1323358000021482
Abstract
Most plates taken with the UK Schmidt Telescope are hypersensitized before use. The technique for the hyper-sensitization of IIIa-type emulsions has been described by Sim et al. (1976), and for the IV-N emulsion by Hartley and Tritton (1979). Photographic calibration is provided by two sensitometers, a seven-step linear array at the N-W corner and a 4 × 4 spot array in the S-E. During the calibration of this latter sensitometer (Dawe and Metcalfe 1981), which is a copy of a design by Schoening (1976), it became apparent that the sensitivity of the hypersensitized IIIa-emulsions in use was decreasing as a function of time in the plateholder.Keywords
This publication has 2 references indexed in Scilit:
- Alignment, pointing accuracy and field rotation of the UK 1.2-m Schmidt telescopeMonthly Notices of the Royal Astronomical Society, 1979
- Experiences in photometry with the Cambridge Schmidt telescopeVistas in Astronomy, 1960