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.