X-Ray Astronomy, 1981
Proceedings of the XV ESLAB Symposium held in Amsterdam, The Netherlands, 22-26 June 1981

The 15th ESLAB symposium was held at the end of June 1981 in Amsterdam with the topic being X-ray astronomy. The aim of this symposium was to bring together the international astrophysical community in order to 1. review the present state of X-ray astronomy in the light of new observations gathered in recent missions and to review data on interesting objects in correlated wavelen8th regions; 2. discuss theoretical models describing the phenomena observed; 3. present ESA's European X-ray Observatory Satellite (EXOSAT) and to discuss future X-ray missions and their associated instrumenta­ tion. These topics seemed to be so interesting for the scientific community that more than 120 contributions were submitted. Of these, 94 were finally accepted and approximately 200 participants attended the 5-day meeting. The symposium was organised in nine sessions covering the whole field. Every main topic was introduced by a review lecture covering the state­ of-the-art. The aim of the meeting was to assess the impact of the new X-ray findings on the general astronomical knowled8e. The discussion ranged from non-degenerated stellar X-ray sources and stellar coronae tL supernovae, bursters, globular clusters, normal galaxies and finally to cosmology. In each field the philosophy was to bring together the relevant information obtained in radio, optical and X-ray observations followed by theoretical discussions. A large number of contributed papers were also presented within this framework.

X-Ray Astronomy in the Einstein Era.- An X-Ray Survey of Flat Spectrum Radio Sources.- X-Ray Emission from Active Galaxies.- Ariel-6 Medium Energy Spectral Observations of Active Galaxies.- “Einstein” Observations of BL Lacertae Objects.- An X-Ray Selected List of QSOs: Implications for the QSO Luminosity Function and the Origin of the Diffuse X-Ray Background (Abstract only).- X-Ray Observations of Emission Line Galaxies with the Einstein Observatory.- Optical Identification of X-Ray Sources in the Einstein Observatory Medium and Deep Surveys.- The Einstein Observatory Medium Sensitivity Survey.- On the Properties of 21 X-Ray Globular Clusters in M31.- Physical Processes for X-Ray Emission in Galactic Nuclei.- The X-Ray Background 2–50 keV: A Superposition of Known Sources, or Evidence of a New Component?.- NGC 4151 and MCG 8-11-11: Two X-Ray Seyfert Galaxies with Strong Soft ?-Ray Emission.- The X-Ray Luminosity Function and Source Counts for Seyferts.- Ultraviolet, Optical and X-Ray Monitoring of the Continuum of NGC 4151.- X-Rays from Active Galactic Nuclei — Hard Component.- Is PKS 2155 an Extragalactic Source?.- X-Ray Emission from Galactic Jets.- A Soft X-Ray Study of the Large Magellanic Cloud (Abstract only).- A Study of M100 in X-Rays.- Low Luminosity Galactic X-Ray Sources.- High X-Ray Luminosity from Dynamo Stars.- X-Ray Spectroscopic Investigation of the Coronal Structure of Capella.- Coronal Activity in F-, G-, and K-Type Stars.- Ariel 6 Observations of the Hot White Dwarf HZ43.- Infrared Photometry of the X-Ray Stars in Cygnus OB2 (VI Cygni): Preliminary Results.- Rapid Oscillations in SS Cygni.- Variability of Soft X-Ray Emission of EX Hydrae Observed with Einstein Observatory.- UV Observations of MV Lyrae.- Ultraviolet Observations of the X-Ray Sources in the Eta Carinae Nebula.- Cosmic X-Ray Observations Performed with a Gas Scintillation Spectrometer.- X-Ray Images of the Supernova Remnant Puppis A.- Spectral Observation of the Soft X-Ray Background and of the North Polar Spur with Solid State Spectrometers.- Hard X-Ray Structure of the Crab Nebula.- On Synchrotron Nebulae and Pulsars (Abstract only).- Cooling of Neutron Stars and X-Ray Observations.- First UV Observations of the Optical Counterpart of the X-Ray Source 2S0114+650.- Optical Observations of the X-Ray Source 2S0921-630.- Ultraviolet Study of V1341 Cyg = Cyg X-2. Observation of an Accretion Disk.- Einstein Observations of the Galactic Centre.- Soft X-Ray Sources and Their Optical Counterparts in the Error Box of the Cos-B Source 2CG 135+01.- X-Ray Binaries and Stellar Evolution (Abstract only).- Hard X-Ray Balloon Observations of Compact Galactic and Extragalactic X-Ray Sources.- High Energy X-Ray Spectrum of Her X-1 (Abstract only).- Hard X-Rays Observation of Her X-1.- New Hard X-Rays Sources at 38° Declination.- Models for Accretion Flow on to Neutron Stars and X-Ray Photon-Electron Interactions in Ultra-High Magnetic Fields (Abstract only).- Observability of Magnetically Strongly Shifted Iron Line Emission from X-Ray Pulsars.- Magnetic Alignment and Counter-Alignment in Binary X-Ray Pulsars.- Ariel VI Observations of Sco X-1.- Periodic Behaviour in Three Galactic Bulge Sources.- Optical Properties of Low-Mass X-Ray Binaries.- New Optical Observations of 2S 0921-630 and Its Relation to Other X-Ray Binaries.- Ariel 6 Observations of Cyg X-1 in the High State.- Ariel VI Soft X-Ray Observations of Cygnus X-1.- Power Spectral Density Analysis of Hard X-Ray Emission of Cyg X-1.- Search for Fast Time Fluctuations in Cygnus-X1 and Herculis-X1.- X-Ray Absorption in Circinus X-1 in the Low State.- Time Variation of the Pulse Period of Vela X-1.- Observation of an Outburst from the X-Ray Pulsator 0115+63.- The Optical Light Curve of LMC X-4 and the 30-Day X-Ray Period.- Ultraviolet and Optical Observations of HDE 245770/A 0535+26 System During an X-Ray Flare.- Recent Optical Observations of the X-Ray Pulsar 4U 1626-67.- Cos-B X-Ray Observations of Cyg X-3; An Indication for Apsidal Motion.- An Optical Outburst from the Periodic Recurrent X-Ray Transient A0533-66.- The X-Ray Source A0538-66 in Optical Quiescence.- The Periodic X-Ray Transient A0538-66 and Its Optical Counterpart.- Ariel 5 Observations of GX 339-4.- Highlights of Results from Hakucho.- The Ariel V Sky Survey of Fast-Transient X-Ray Outbursts.- Periodic X-Ray Outbursts from A0535+26, 2S1145-619 and GX301-2.- X-Ray and Optical Observations of the November 19, 1978 Gamma-Ray Burst Source Region.- Are ?-Ray Bursters Neutron Stars Accreting Interstellar Matter?.- Discovery of Rapid Optical Variability in GX 339-4.- The EXOSAT Mission.- The X-Ray Imaging Telescopes on EXOSAT.- The Medium Energy Instrument on EXOSAT.- The Gas Scintillation Proportional Counter on EXOSAT.- X-Ray Astronomy in the Future.- Future Programme of X-Ray Astronomy in Japan.- The ROSAT Mission.- Development of a 1m-Normal-Incidence-EUV Telescope.- The Use of Diamond Turned & Replicated Wolter 1 Telescopes for High Sensitivity X-Ray Astronomy.- The Capabilities of a Gas Scintillation Camera for Cosmic X-Ray Astronomy.- A Pseudo Random Mask Telescope for Spacelab.- Spherical Crystal Cosmic X-Ray Spectrometer.- Wide Angle X-Ray Optics for Use in Astronomy.- X-Ray Binaries and Stellar Evolution.