Other
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..447g&link_type=abstract
Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 447-454.
Other
27
Bl Lacertae Objects, Continuous Radiation, Polarimetry, Quasars, Red Shift, Spectrophotometry, Absorption Spectra, Emission Spectra, Line Spectra, Luminosity, Spectrum Analysis, Velocity Distribution
Scientific paper
Spectrophotometry and polarimetry of PKS 0215+015 show it to have all the commonly accepted defining properties of a BL Lac object. Over the past 30 years PKS 0215+015 has varied by over 4 mag. It has been observed to show variable polarization of up to 37%. Although PKS 0215+015 has so far shown no emission lines, it has three definite absorption line systems with redshifts of 1.3449, 1.5494, and 1.6494. PKS 0215+015 is shown to be similar to previously known lower redshift BL Lac objects. A curve of growth analysis of the z = 1.3449 system shows it to have similar column densities and a similar velocity dispersion to the halo of our Galaxy. A new value of the oscillator strength of Fe II lambda 1608 is proposed. The possible nature of the other two absorption line systems is discussed. Some objections are raised to the idea of BL Lac objects having their optical continua boosted by relativistic beaming of the continua toward us.
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