Digitized First Byurakan Survey - DFBS







First Byurakan Survey

                            Technical data

                            FBS zones statistics

                            Markarian galaxies

                            FBS based projects




                            About DFBS






                            Sample spectra

                            Data visualization

                            Science with DFBS


                            DFBS at Roma

Virtual Observatories

                            Armenian VO





Other related links

                            Armenian Astronomy

                            Byurakan Observatory







The FBS was conducted originally for search of galaxies with UV-excess. The discovery of 1515 UV-excess (UVX) galaxies by Markarian and colleagues (later called Markarian galaxies) was the first and the most important work based on the FBS plates (Markarian 1967, Markarian et al. 1989). There are more than 200 Seyferts, dozens of QSOs, few hundreds of starburst and HII galaxies, BL Lac objects, radio, IR and X-ray sources among them (Mazzarella & Balzano 1986; Markarian et al. 1997). During the last 30 years more than 2500 scientific papers have been published on study of these objects. There are many Markarian galaxies, which are subject of study for understanding of AGN phenomenon, starburst activity and evolution of galaxies, high-luminosity IR radiation, AGN variability, double and multiple structure of the nucleus, composite spectrum AGN, galaxy interactions and merging, connection between different types of active galaxies, early stages of evolution of galaxies (some Markarian galaxies are BCDGs), and other important topics of modern extragalactic astronomy. Study of Markarian galaxies brought to discovery of many new Seyferts and spectral classification of this type of objects (Weedman & Khachikian 1971).


Some important Markarian galaxies:


Mrk 231 the closest ULIG, BAL QSO, and the most luminous ULIG in the Local Universe

Mrk 116 the most metal-deficient BCDG (=IZw18)

Mrk 421, 501 are among the highest known energy sources

Mrk 501 one of the 5 known TeV sources

Mrk 938 the first dynamical merger discovered observationally

Mrk 273 a wonderful double-double nuclei galaxy

Mrk 6 variations of spectral lines typical of different types of objects and very high column density of H in

X -rays

Mrk 926 one of the rare Sy1 galaxies having LINER properties

Mrk 266 has a multiple structure nuclear region

Mrk 766 one of the most important NLS1 galaxies

Mrk 110 is crucial for understanding differences between NLS1s and BLS1s

Mrk 231,507 are among the 5 known superstrongest FeII emitters

Mrk 530,993,1018 change their spectra from Sy2 to Sy1 being important for the unified scheme of AGN





Markarian B.E., 1967, Astrophysics, 3, 55.

Markarian B.E., Lipovetski V.A., Stepanian J.A., Erastova L.K., Shapovalova A.I., 1989, Commun. Special Astrophys. Obs., 62, 5.

Markarian B.E., Lipovetsky V.A., Stepanian J.A., 1997, Catalog No. VII/172 at CDS, at http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=VII/172.

Mazzarella J.M., Balzano V.A., 1986, A Catalog of Markarian Galaxies, Astrophys. J. Suppl. Ser., 62, 751.

Weedman D.W. and Khachikian E.Ye., 1971, Astrophysics, 7, 389.




For further info and use of the DFBS contact Dr. Areg Mickaelian

2002-2004 Digitized First Byurakan Survey