Observational evidence of activity in galaxies : proceedings of the 121st Symposium of the International Astronomical Union, held in Byurakan, Armenia, U.S.S.R., June 3-7, 1986

I. Surveys of Active Galaxies and QSO's. - Lists of Active Galaxies, Problems of Detection and Statistics. - The First Byurakan Survey (FBS) and Search Problems for AGN. - The Second Byurakan Spectral Sky Survey. - A Survey and Related Observations of the KISO Ultraviolet-Excess Galaxies. - Observational Evidences for the Evolution of the Quasar-Luminosity Function. - A Deep Spectral Survey on the 6-Meter Telescope. - An Emission-Line Galaxy Survey with the UK Schmidt Telescope. - Search for Variable Extragalactic Objects. - II. Ultraviolet Excess Galaxies. - UV-Galaxies. - Several Statistical Properties of Galaxies with UV Excess. - Markarian Galaxies and Zwicky Clusters. - The Byurakan Classification and the Colours of the Central Parts of Spiral Galaxies. - Morphology of Galaxies with UV-Continuum. - Morphology of Isolated and Grouped Galaxies. - Blue Objects Near M 31 and Optical Identifications of 5C3 Sources. - III. Seyfert Galaxies. - Seyfert Galaxies: Classification, Morphology, Observations at Optical Wavelengths, Environmental Factors. - The 0.3 to 100 Micron Continua of Type 1 Seyferts. - Extended Infrared Emission in Seyfert Galaxies. - Extended Line Emitting Regions in the Seyfert Galaxy NGC 2992. - Low Frequency Cutoffs in the Spectra of Radioquiet Quasars. - The Structure of Galaxies and their Nuclear Activity. - Statistical Studies of AGN and QSOs. - On the Hydrodynamical Conception of the Spiral Structure in Galaxies with a Velocity "Kink" on the Rotation Curve. - IV. Variability. - Spectral Variability in Seyfert Galaxies. - Emission Lines Variations in the Spectra of Seyfert Galaxies Nuclei. Observational Data. - A Search for Periodicities in the Light Variation of Some Seyfert Galaxies. - Kinematical and Spectral Evidences of Complex Structure of NGC 1275 Nucleus. - Photoelectric Observations of Continuous and Emission Lines Variability in Spectra of Seyfert Galaxy NGC 1275 Nucleus. - Investigation of the Spectra of some Seyfert Galaxies. - Hss Profile Variations in the Spectrum of Seyfert Galaxy NGC 5548 Nucleus. - Variable Objects in a Complete Sample of Faint Radio Sources. - The Low Frequency Variability of Extragalactic Radio Sources. - Multifrequency Observations of the Seyfert Galaxy 3C 120 in 1983-1986. - 1-3-Day Variations of the Broad Emission Lines of Seyfert Nuclei. - A Possible Mechanism to Explain the Narrow Line Variability of Seyfert Galaxies on Timescales of Months. - The Excitation Mechanism of Metastable Levels and Variability of Oxygen Forbidden Lines 4959+5007 A [OIII] in the Seyfert Nuclei. - V. Jets, Superluminal Motions and Blazars. - Ionization and Kinematics of the Narrow Line Region in Seyfert Galaxies. - Unity and Diversity Among Jets in Active Galaxies. - VLBI Observations of NGC4151 at 6 CM Wavelength. - Radio Emission from Active Galactic Nuclei. - Bulk Relativistic Motion in a Complete Sample of Radio Selected AGN. - 3C454.3: A New Kind of Superluminal Source? - Studies of the 3C 345 Quasar Structure at DM-Wavelengths. - Connection between Optical Outbursts and Superluminal Motion in the Milliarcsecond Radio Structure of the Extragalactic Objects. - A Probable Model of Compact Variable Radio Sources with a "Superluminal" Motion Of VLBI-Components. - On the Nature of Processes Occurring in Active Nuclei of Galaxies. - Multifrequency Observations of Blazars. - Polarimetric and Photometric Investigations of Lacertids. - Active Galactic Nuclei from the Extended Einstein Medium Survey. - The Forest of Absorption Lines in QSO Spectra - A Key to the Large Scale Structure Development? - The Primeval Hadron: Origin of Rotation and Magnetic Fields in the Universe. - VI. Environmental Aspects of Nuclear Activity. - Relationships between Seyfert Galaxies, QSOs, and BL LACs. - Imaging of Low Redshift PG Quasars and their Companions. - Nuclear Activity of Galaxies within Groups. - Multi-Frequency Observations of Multiple Nucleus Markarian Galaxies. - High Spatial Resolution Observations of the Quasar MR2251-178. - 1411+442: Optical Imaging of a BAL QSO. - Morphology and Spectroscopy of Markarian 231. - Seyfert 2 Galaxies with Double Nuclei. - The Role of Environment in the Origin of Radio Emission from Galaxies. - On the Radio Emission from Interacting Spiral Galaxies. - VII. Low Level Activity and Intermediate Objects. - The Nature of Liners. - Low-Luminosity Active Nuclei in Elliptical Galaxies. - A Search for Low-Level Seyfert Activity in the 500 Brightest Northern Galaxies. - Activity in Near-Normal Galaxies. - X-Ray Emission as Evidence of Activity in otherwise "Normal" Galaxies. - Tight Nuclear Spirals: Observational Evidence of Nuclear Activity. - Evidence for Activity in the Spiral Galaxy NGC4319. - On the Radio Emission of Barred Spirals. - Radio Continuum Emission and Optical Emission-Line Activity in the Nuclei of Spirals. - VIII. Starburst Activity. - Starburst Models for AGNs. - VLBI Observations of the M81-M82 Pair of Galaxies. - Optical Evidence for a Dust Ring in the Centre of M 82 and (OR? ) a Flat Star Burst Region. - Star Formation in Galactic Nuclei. - The Thermal Component of the Seyfert Galaxy NGC1275. - Spectra of Nucleus of NGC 6240. - Superassociations in the Arms of Normal and Active Galaxies. - Activity in Blue Compact Galaxies. - Nests of Interacting Galaxies: What is it? - A Spectral Study of Markarian 297. - Concluding Remarks. - List Of Authors.