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MARKARIAN - Markarian Galaxies Catalog

Overview

The MARKARIAN database contains the lists "Galaxies with Ultraviolet Continuum" (MKN; Markarian 1967, 1969, 1969, Markarian and Lipovetskii 1971, 1972, 1973, 1974, 1976a, 1976b, Markarian et al., 1977a, 1977b, 1979a, 1979b, 1979c, 1982).

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.

Parameters

Name

The 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 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).

2nd_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).

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 an Palomar Sky Survey.

Minor_Axis

Arc seconds an 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 `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.

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.

Contact_Person

Any questions or problems related to the MARKARIAN database should be addressed to ledas-help@star.le.ac.uk