Proceedings of the Conference on Seyfert Galaxies and Related Objects: 26. Photometry of Southern Quasistellar Objects, N Galaxies, and Possibly Related Objects

1968 ◽  
Vol 73 ◽  
pp. 883
Author(s):  
Bengt E. Westerlund ◽  
Jasper V. Wall
Keyword(s):  
Seyfert Galaxies ◽  
Quasistellar Objects

The Second Byurakan Spectral Sky Survey. Quasistellar Objects and Seyfert Galaxies

1989 ◽  
pp. 31-34 ◽  
Author(s):  
J. A. Stepanian ◽  
L. K. Erastova ◽  
V. A. Lipovetsky ◽  
A. I. Shapovalova
Keyword(s):  
Seyfert Galaxies ◽  
Sky Survey ◽  
Quasistellar Objects

Quasistellar objects and seyfert galaxies

Physics Today ◽  
1969 ◽  
Vol 22 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Stirling A. Colgate
Keyword(s):  
Seyfert Galaxies ◽  
Quasistellar Objects

scholarly journals The Second Byurakan Spectral Sky Survey, Quasistellar Objects and Seyfert Galaxies

1989 ◽  
Vol 134 ◽  
pp. 31-34
Author(s):  
J.A. Stepanian ◽  
L.K. Erastova ◽  
V.A. Lipovetsky ◽  
A.I. Shapovalova
Keyword(s):  
Seyfert Galaxies ◽  
Byurakan Survey ◽  
Sky Survey ◽  
Quasistellar Objects ◽  
Efficiency Of Selection ◽  
Low Dispersion

Survey of surveys, and the place of the Second Byurakan Survey (SBS) among them is shortly discussed. Deep low-dispersion surveys cover > 10000 sq.degrees, but they managed to study only 15% of this area relatively well.For 450 SBS objects the slit spectra were obtained on 6 m telescope of SAO. The nature of 120 QS0s,40 Sy galaxies and more than 200 ELG are confirmed. The results of the slit spectroscopy in six SBS fields covering commonly the area of ∼100 sq.degrees are presented.All surveys, except Byurakan Surveys are extremely poor with Sy galaxies, that is their distinction from other surveys. Weak (16<m<18m5) SBS Sy galaxies sufficiently well filled in the interval between QSOs and Sy galaxies, the efficiency of selection does not much depend on redshifts. There is quite good pass from Sy galaxies to QSOs.

scholarly journals Active Nuclei and Redshift Problems

1983 ◽  
Vol 6 ◽  
pp. 531-533
Author(s):  
Geoffrey Burbidge
Keyword(s):  
Galactic Nuclei ◽  
Seyfert Galaxies ◽  
Radio Sources ◽  
Powerful Radio ◽  
Radiation Mechanism ◽  
X Ray ◽  
Major Interest ◽  
Relativistic Particles

More than 20 years ago V. A. Ambartsumian proposed that much of the activity in galaxies was dominated and even generated by their nuclei. Subsequent observational work in radio, optical and x-ray frequencies has borne out his prophecy, and major interest has centered about the nature of the machine in the galactic nucleus. The major characteristic of this machine is that it releases energy rapidly and often spasmodically by processes which are not thermonuclear in origin.The original studies which led to the conclusion that nuclei were all important were observations of the powerful radio sources and Seyfert galaxies, and evidence for the ejection of gas from galaxies of many types. The realization that the synchrotron mechanism was the dominant radiation mechanism and the later studies of Compton radiation were fundamental in leading to the conclusion that large fluxes of relativistic particles must be generated in galactic nuclei.

scholarly journals A comprehensive analysis of the hard X-ray spectra of bright Seyfert galaxies

2016 ◽  
Vol 458 (3) ◽  
pp. 2454-2475 ◽  
Author(s):  
P. Lubiński ◽  
V. Beckmann ◽  
L. Gibaud ◽  
S. Paltani ◽  
I. E. Papadakis ◽  
...  
Keyword(s):  
Seyfert Galaxies ◽  
Comprehensive Analysis ◽  
X Ray
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