MARKARIAN: Help

Overview

Markarian galaxies have a moderate to strong ultraviolet continuum, as detected by an objective-prism survey at Byurakan Observatory from 1965 to 1978. The survey was done with a 40-inch Schmidt telescope, with a dispersion of 2500 angstroms/millimeter at H-alpha. The catalog contains no galaxies brighter than magnitude 13.0 or fainter than magnitude 17.5.

Catalog Bibcode

References

Markarian, B. E. 1967, Astrofizika 3, 55.
Markarian, B. E. 1969, Astrofizika 5, 443.
Markarian, B. E. 1969, Astrofizika 5, 581.
Markarian, B. E., Lipovetskii, V. A.  1971, Astrofizika 7, 511.
Markarian, B. E., Lipovetskii, V. A.  1972, Astrofizika 8, 155.
Markarian, B. E., Lipovetskii, V. A.  1973, Astrofizika 9, 487.
Markarian, B. E., Lipovetskii, V. A.  1974, Astrofizika 10, 307.
Markarian, B. E., Lipovetskii, V. A.  1976, Astrofizika 12, 389.
Markarian, B. E., Lipovetskii, V. A.  1976, Astrofizika 12, 657.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1977,
       Astrofizika 13, 225.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1977,
       Astrofizika 13, 397.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1979,
       Astrofizika 15, 201.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1979,
       Astrofizika 15, 363.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1979,
       Astrofizika 15, 549.
Markarian, B. E., Lipovetskii, V. A., Stepanian, Dzh. A. 1981,
       Astrofizika 17, 619.

Parameters

Name
Markarian Identifier. Catalog desgination MKN, followed by a sequential number from 1 to 15000, followed by a blank or by `A`.

Active_Flag
'S' or 'Q', respectively, if the galaxy is a possible Seyfert galaxy or a QSO.

Alt_Name
Alternative identifier, either from MGC (Morphological Catalog of Galaxies), NGC (New General Catalogue), IC (Index Catalogue), HARO (Blue Galaxies with Emission Lines), or HZ (Humason and Zwicky).

Alt_Name2

RA
The right ascension of the object. Coordinates are from Vorontsov-Velyaminov, et al., or from Zwicky, et al.

Dec
The declination of the object. Coordinates are from Vorontsov-Velyaminov, et al., or from Zwicky, et al.

LII
The galactic longitude of the object.

BII
The galactic latitude of the object.

Major_Axis
Arc seconds in Palomar Sky Survey.

Minor_Axis
Arc seconds in Palomar Sky Survey.

Mag
Estimated magnitude from objective prism spectrum.

Mkn_Type
'S', 'SD', 'DS', and 'D' describe the general appearance of the spectrum on the Schmidt plate, ranging respectively from sharp to diffuse.

There is also a code for the strength of the ultraviolet coninuum, with 1 as the brightest, and 3 as the least bright. This part of the scheme changed over the course of the survey: originally, 1 meant strong and 2 meant moderate, with an intermediate classification of 12 (galaxies MKN 1-70). The codes 1, 2, and 3 imply similarity to stellar spectra types O-B0, B1-B3, and B5-B8, respectively (Markarian et al. 1979b).

At the end of this type there may appear an 'E' for emission lines or 'E:' for possible emission lines.

Class
BROWSE classification type. The classification is based on the Type parameter, if one is available.

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