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:
|| 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
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.