H. G. Corwin

Third Reference Catalogue of Bright Galaxies

This new, enlarged reference catalogue of bright galaxies in three volumes reflects the explosive growth of extragalactic astronomy over the last 15 years. With data on more than 23,000 galaxies, it includes all galaxies with apparent diameters larger than one arc minute, magnitudes brighter than about magnitude 15.5, and redshifts not larger than 15,000 km/sec, as well as many other objects of interest. Volume 1 contains the explanations and references; volumes 2 and 3 contain the catalogue proper. The catalogue gives for each galaxy, the position, names, type and luminosity class, optical diameters, optical and infrared magnitudes, various colour indices and radial velocities. The work also makes reference to papers on bright galaxies published between 1913 and 1988. This dictionary/encyclopaedia on stellar systems is intended for researchers in astronomy.

A Comparative study of morphological classifications of APM galaxies

We investigate the consistency of visual morphological classifications of galaxies by comparing classifications for 831 galaxies from six independent observers. The galaxies were classified on laser print copy images or on computer screen produced from scans with the Automated Plate Measuring (APM) machine. Classifications are compared using the Revised Hubble numerical type index T. We find that individual observers agree with one another with rms combined dispersions of between 1.3 and 2.3 type units, typically about 1.8 units. The dispersions tend to decrease slightly with increasing angular diameter and, in some cases, with increasing axial ratio

S Andromedae 1885 - A centennial review

(b/a)

The Hubble ratio from sosies of M31 in the Virgo S cloud and in the Hercules supercluster

. The agreement between independent observers is reasonably good but the scatter is non-negligible. In spite of the scatter the Revised Hubble T system can be used to train an automated galaxy classifier, e.g. an Artificial Neural Network, to handle the large number of galaxy images that are being compiled in the APM and other surveys.

The distance of the Hercules supercluster from supernovae and Sbc spirals, and the Hubble constant

Etude de la courbe de lumiere definitive de cette supernova, membre de M31, dapres une nouvelle reduction de 40 etoiles de comparaison dans le systeme V et des observations recentes

Galaxy Catalogues and Surveys

Letude par la methode des galaxies sosies conduit a un rapport de Hubble H*=99±15 kms −1 Mpc −1 . La constante de Hubble peut en differer de quelques pourcent selon le modele cosmologique

The de Vaucouleurs Atlas of Galaxies

On determine le module de distance du superamas de galaxies dHercule par deux methodes independantes. Les deux determinations obtenues sont en excellent accord avec le module moyen deduit precedemment par differentes autres methodes (Buta et de Vaucouleurs, 35,25±0,14; Buta et Corwin 35,14±0,22)

INTERGALACTIC EXTINCTION IN THE LOCAL SUPERCLUSTER. I. SELECTIVE EXTINCTION.

I’d like to begin this survey of surveys and catalogues of galaxies with a story about Gerard de Vaucouleurs and myself. When I first went to work for him in the summer of 1965, I was the proud owner of a copy of the then-new Reference Catalogue of Bright Galaxies (RC1; 1964). I don’t often seek autographs for my books, but this was a special occasion and a special book, so I asked Gerard and Antoinette for their autographs. After signing the title page, Gerard began leafing through the catalogue and noticed some of my penciled “updates” in the B(0) column. Learning that these magnitudes had not (yet!) been reduced to the B(0) system, he scolded me for putting the wrong numbers in the catalogue. Properly chastized, I immediately wrote a short computer program to do the reduction, and spent the necessary time to get the correct data into the correct columns.