Catalog of Blue Survey Objective Prism Plates 1967-1984Up one level
Objective-prism plates taken with the Michigan Curtis Schmidt telescope at Cerro Tololo Inter-American Observatory (CTIO) in Chile and the Case Burrell Schmidt telescope at the National Optical Astronomy Observatories (NOAO) in Arizona. Dr. Nancy Houk was the PI and led the effort to classify stars on the plates. Her work resulted in the Michigan Spectral Catalogue. The 4 deg + 6 deg combined prisms (Curtis) and 10 deg prism (Burrell) yield a dispersion at H gamma of 108 A/mm, and the resolution is about 2A, comparable to that of the original MK system. The spectra were taken on unfiltered IIaO photographic plates and widened to 0.8 mm, with 20 min, 4 min and 1 min exposures being obtained.