MRK (G0): Markarian Galaxy Catalog (19890806)
FILES: mrk.g0 (1500 galaxies), mrk.g0n (notefile)
CONTENTS: Markarian Galaxy Catalog
DATASET: These files are part of HyperSky dataset G-3 (G-3.3), version 19890806. Availability on HyperSky CD-ROM: Vol. 1 (1993)
DESCRIPTION: Data for mrk.g0 has been taken from The Astrophysical Journal Supplement Series, Dec 1986, "A Catalog of Markarian Galaxies" by J.M. Mazzarella and V.A. Balzano. Their catalog was compiled from 15 lists of objects with blue excess and strong ultraviolet continuum radiation, which were found by Markarian and others on low-dispersion object prism plates from the 40-52 inch Schmidt telescope at Byurakan Astrophysical Observatory. The catalog provides a principal base from which the major types of non-QSO active galactic nuclei have been discovered, classified and studied by numerous researchers. Emission-line galaxies with all degrees of activity discovered the survey have become known collectively as Markarian galaxies.
The catalog covers the declinations -20 < dec < 90. Positions from the manual data transcription were machine-compared against an independent transcription provided by Dr. Harold Corwin; errors were found and corrected in both sets. Additional research revealed a few typographical position errors in the original paper (above) which have been corrected in this file.
DATA: The HyperSky datafile contains the following data from the catalog:
MAG: The apparent magnitude of the object from the paper.
IDENTIFICATION: The Markarian sequence number
COMMENTS: The comment line contains the following additional information, provided if available for each galaxy:
* Alternate NGC, IC or other identifications, from catalog notes.
* Notes on paired objects.
* Morphological type.
NOTEFILE: The notefile contains the following information, provided if available for each object:
* Heliocentric redshift, z. (A redshift of z=0.0115 would correspond to spectral lines being shifted to wavelengths 1.15% longer than those of a body at rest.)
* Class: special classes of an object. Possible classes include various Seyfert galaxy classes, starburst nuclei, HII-type galaxies and others.
* Additional cross-identifications and notes on pairs or companions.
* Other descriptive notes on membership in groups or chains, variable magnitudes, etc.