Shapley Ames Catalog
The Shapley-Ames catalog is a galaxy catalog published in 1932 with 1249 objects brighter than 13.2th magnitude .
It was compiled by Harlow Shapley and Adelaide Ames based on the New General Catalog and the Index Catalog . With the help of new photographs, which also contained comparative stars of known brightness, the brightness of many galaxies was measured, and only galaxies up to size class 13.2 were included in the catalog. It was the first compilation of bright galaxies that was almost complete up to a certain limit brightness for the northern and southern skies and formed the basis of many studies of galaxies. The catalog contains the position, brightness, extent and Hubble classification of the galaxies it contains.
In 1981 Allan Sandage and Gustav Tammann published an updated version, the Revised Shapley-Ames Catalog (RSA) . The original galaxy list has been retained, with the exception of three objects that are not galaxies. The information on the 1246 individual galaxies has been updated and significantly expanded.
literature
- H. Shapley, A. Ames: A survey of the external galaxies brighter than the thirteenth magnitude. In: Annals of Harvard College Observatory. 88, no. 2, 1932, p. 41.
- A. Sandage, GA Tammann: A Revised Shapley-Ames Catalog of Bright Galaxies. Carnegie Institution, Washington 1981, ISBN 0-87279-652-3 .