Blazars with arcminute-scale radio halos

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Bl Lacertae Objects, Blazars, Extragalactic Radio Sources, Halos, Quasars, Stellar Envelopes, Astronomical Maps, Centimeter Waves, Gravitational Lenses, High Resolution

Scientific paper

About 10-arcsec resolution 20-cm wavelength maps are presented for three nearby BL Lac objects: Mkn 180, whose halo has a linear size of 85 kpc, 2155-304, with a halo about 375 kpc across, and 1727 + 502, whose one-sided diffuse emission extends to a distance of about 145 kpc from its radio core. Little evidence is found for strong radio variability in the cores of the three blazars; these and other results obtained are consistent with the assertion that the three objects should be classified as normal low luminosity double radio galaxies with optically dull nuclei, if seen from other directions.

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