Classification Based on 102/Å/mm Objective Prism Spectra

J.V. Clausen, K.S. Jensen
1979 International Astronomical Union Colloquium  
Equipped with a 15° F2 objective prism the (45/77/150)cm Schmidt telescope of the Copenhagen university Observatory, Brorfelde yields spectra of 102 A/mm at Hα to a limit of approximately mpg=9.5.
doi:10.1017/s0252921100104415 fatcat:62fd5qbzefhvlchyllc5qxxzma