1999/10/12 by P. Cassaro, C. Stanghellini, M. Bondi +4 · 10 citations
Engineering · Physics and Astronomy · #Astrophysics and Cosmic Phenomena #GNSS positioning and interference #Radio Astronomy Observations and Technology #astro-ph
paper · pdf · doi:10.1051/aas:1999511
12 pages, 35 figures, to appear on A&A Supp. Ser., postscript file with figures included available at http://www.ira.noto.cnr.it/staff/carlo/ds1030.ps.gz
arxiv created 1999/10/12 · openalex publication_date 1999/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
We have observed 28 sources selected from the 1Jy sample of BL Lac objects [(Stickel et al. 1991)] with the Very Large Array (VLA) in A, B and D configurations at 1.36, 1.66 and 4.85 GHz, and/or with the Westerbork Synthesis Radio Telescope (WSRT) at 1.40 GHz. In this paper we present high sensitivity images at arcsecond resolution of the 18 objects showing extended structure in our images, and of another source from the FIRST (Faint Images of the Radio Sky at Twenty-cm) survey [(Becker et al. 1995).] In general our high sensitivity images reveal an amount of extended emission larger than previously reported. In some objects the luminosity of the extended structure is comparable with that of FR II radio sources. A future paper will be devoted to the interpretation of these results.