Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.209..245i&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 209, July 15, 1984, p. 245-269.
Astronomy and Astrophysics
Astronomy
64
Astronomical Spectroscopy, Bl Lacertae Objects, Infrared Spectroscopy, Polarimetry, Astronomical Catalogs, Polarization Characteristics, Radiant Flux Density, Spectral Energy Distribution, Wavelengths
Scientific paper
The present investigation is concerned with the results from a continuing program to monitor the infrared polarization of BL Lac objects. Data from the first year of monitoring have been reported by Impey et al. (1982). Infrared polarimetry and photometry have now been obtained for 19 BL Lac objects. A sufficient data base has now been established to examine the polarization properties of BL Lac objects statistically. All observations were conducted with the aid of the 3.8-m United Kingdom Infrared Telescope (UKIRT) on Mauna Kea using a photovoltaic InSb detector and rotating HR Polaroid. Attention is given to aspects of spectral energy distribution, luminosity parameters, the relationship between polarization and spectral index, changes in polarization and variability, changes in polarized and total flux, wavelength-dependent polarization, and the Q-U plane.
Brand Peter W. J. L.
Impey Chris David
Williams Peredur M.
Wolstencroft Ramon D.
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