325 datasets found

Keywords: BL Lacertae objects

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  • VLBI observations of BL Lac objects

    We present EVN observations of seven BL Lac objects selected from the RGB sample. To investigate the intrinsic radiation property of BL Lac objects, we estimated the Doppler...

  • The HRX-BL Lac sample

    The unification of X-ray and radio selected BL Lacs has been an outstanding problem in the blazar research in the past years. Recent investigations have shown that the gap...

  • ROSAT observations of BL Lacertae objects

    We present soft X-ray spectra of 74 BL Lacertae objects observed with the PSPC detector on board of the ROSAT satellite. The sample contains all BL Lac objects detected during...

  • BL Lac objects and OVV quasars

    Based on the idea that a group of extragalactic objects which can be regarded as a category with similar physical properties must fit the Hubble relation, we present a new,...

  • Long-Term Polarization of BL Lac

    Both photometric and polarimetric data of BL Lac were obtained with the .5-m telescopes of the Byurakan station of the Astronomical Institute of St.-Petersburg University.
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