1011 + 496 and 1217 + 348: two new candidate BL Lacertae objects

Details 1011 + 496 and 1217 + 348: two new candidate BL Lacertae objects 1011 + 496 and 1217 + 348: two new candidate BL Lacertae objects

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.219..299w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 219, March 15, 1986, p. 299-304.

Astronomy and Astrophysics

Astronomy

11

Bl Lacertae Objects, Extragalactic Radio Sources, Astronomical Photometry, Infrared Spectra, Polarimetry, Spectral Energy Distribution, Visible Spectrum

Scientific paper

Combined optical and radio data on the extragalactic radio sources 1011 + 496 and 1217 + 348 led to the hypothesis that these sources belong to the class of BL Lacertae (BL Lacs) objects. To test this hypothesis, additional optical polarimetry, infrared photometry and optical spectroscopy was performed. The combined optical-infrared specral energy distributions of these two objects are shown, and it is noted that the shape of their continua resemble those seen in compact active extragalactic objects; both objects are highly polarized, with polarizations in excess of those seen in normal quassars, but comparable to those seen in BL Lacs. The spectra of these sources distinguish them from BLRGs, while the lack of strong emission lines indicate that they are not OVVs. The radio morphology of 1011 + 496, a compact core with a faint extended halo, resembles those seen in BL Lacs. In effect, the continum shapes, polarizations, lack of strong emission lines and in one case, the radio structure, lead to the conclusion that 1011 + 496 and 1217 + 348 are most likely BL Lacertae objects.

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