BL Lac Objects

Superluminal motion in quasars and BL Lac objects.- Statistics of superluminal sources.- VLBI polarization measurements of BL Lacertae objects.- Statistical properties of radio polarization of blazars.- The physical conditions and orientations of parsec-scale jets derived FROM CM-waveband variability data.- Radio variability of BL Lacs and related objects: Observations vs. shocked jet models.- The host galaxy of BL Lac objects or what's in a name?.- Optical observations of a complete sample of radio selected BL Lac objects.- A spectroscopic study of blazars at medium resolution. Observations of PKS 0521-36, PKS 0537-44 and PKS 0823-22.- Beamed ionizing radiation in radio galaxies.- What are the emission line filaments along the radio axis of Centaurus A?.- Narrow band imaging close to the nuclei of BL Lac objects.- Anisotropic ionising continuum emission in AGNs.- Optical-infrared synchrotron emission in luminous AGN.- Polarization OF BL Lac objects.- Simultaneous UBVRI polarimetry of blazars.- Optical photometry and polarimetry of BL Lacertae objects.- An optical polarization survey for BL Lacs.- Long-term optical variability of BL Lac objects.- The nature of the rapid optical variability observed for BL Lacertae.- Energy distributions of blazars.- Radio and optical variability in blazars.- Simultaneous optical and IR observations of BL Lacertae objects.- Simultaneous optical and IR polarimetric observations of Blazars.- Multiwaveband observations of the Blazar 1156+295.- Recent activity in 3C 273.- Questions and comments.- BL Lacertae objects detected in the HEAO-1 all sky X-ray survey.- BL Lac objects from the extended medium sensitivity survey: The surface density.- BL Lacertae objects from the EXOSAT high galactic latitude survey: Constraints on the LogN-LogS and on the cosmological evolution.- The optical and radio properties of X-ray selected Bl Lacertae Objects.- Optical polarimetry of x-ray selected BL Lacs 1989.- Two new BL Lacertae objects discovered in the error boxes of hard X-ray sources.- Discovery of an X-ray selected optically highly variable quasar.- Einstein observatory X-ray spectra of BL Lac objects.- BL Lac objects as X-Ray sources: The Exosat observations.- The exosat spectral survey of BL Lacertae objects.- X-ray studies of BL Lac objects with Ginga.- Spectral components of BL Lac objects and other compact extragalactic radio sources.- The X-ray variability of PKS 2155-304: A power spectrum analysis.- Emission models of BL Lac objects.- On the energy dependent variability of BL Lac Objects.- Relativistic jet models for the BL Lacertae object Mrk 421 during three epochs of observation.- On the steep X-ray spectrumof BL Lac objects.- Models of OJ 287 based on optical monitoring.- On speed of jets.- The interaction of relativistic jets with the ambient radiation field.- Collimation and polarization of radiation through scattering by jets.- Accretion-disk models of BL Lac objects.- The relationship between BL Lacertae objects and other types of active and normal galaxies and quasi-stellar objects.- BL Lac objects, OW/HPQs and unified models.- The relation of BL Lac objects to QSOs and galaxies.- Is gravitational lensing important for BL Lac objects?.- Galaxies near distant quasars: Evidence for statistical gravitational lensing.- Relativistic beaming, luminosity functions, and the number counts of BL Lac objects.- Evolutionary BL Lacs ?.- A model for the evolution of quasars and BL Lacs.- Nature and evolution of BL Lac objects.- General discussion.