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The FBS was conducted originally for search for 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.
The Markarian survey was the first systematic search for AGNs. The study of Markarian galaxies brought to discovery of many new Seyferts and the first spectral classification of this type of objects, as well as to the definition of starburst galaxies.
Among the Markarian galaxies there are more than 200 Seyferts, dozens of QSOs, 17 LINERs, few hundreds of starburst and isolated HII galaxies, 3 BL Lac objects, radio, IR, X- and gamma-ray sources, interacting and merging objects, galaxies with double and multiple nuclei.

There are many Markarian galaxies which are subject of study for understanding the 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, connections between different types of active galaxies, early stages of evolution of galaxies and other important topics of modern extragalactic astronomy.

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

The second part of the FBS was devoted to the discovery and investigation of blue (UVX) stellar objects and late-type stars. The program of blue stellar objects was carried out by H.V. Abrahamian and A.M. Mickaelian in 1987-1996 in 278 FBS fields, in a 4009 sq.deg. area of the FBS. 1103 objects have been selected, including 716 new blue stellar objects. Follow-up observations have been carried out for 450 objects. 40 new bright AGNs have been discovered already among them. The local density of QSOs and the completeness of the Bright Quasar Survey (BQS) has been re-estimated. A number of interesting WDs and CVs have been discovered too, such as the new bright SW Sex type cataclysmic variable. The survey for late-type stars on the FBS plates is being carried out since 1987 by H.V.Abrahamian and K.S.Gigoyan. 813 late M-type and carbon stars have been selected already in an area of 6640 sq.deg., including 560 new ones.

A program of optical identifications of IRAS sources on the basis of the FBS plates is active since 1995. 1577 previously unidentified IRAS point sources have been optically identified in the area +61 DEC +90 with a surface of 1487 sq.deg. 1178 of the identified sources are galaxies. The identifications program brought to two samples of objects: BIS (Byurakan-IRAS Stars), and BIG (Byurakan-IRAS Galaxies).
The BIG objects contain Seyferts, LINERs, composite spectrum AGNs, high-luminosity IR galaxies, groups of galaxies (including compact ones), interacting and merging galaxies, as well as obscured IRAS galaxies.
The subsample of galactic objects contains new planetary nebulae, AGB stars, late M and Carbon stars. Some of them have excessive IR fluxes, suggestive of extended dust shells; a number of stars show evidence of variability.