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- W2146321325 abstract "This paper presents the optical properties of the objects selected in the CLASS blazar survey. Because an optical spectrum is now available for 70 per cent of the 325 sources present in the sample, a spectral classification, based on the appearance of the emission/absorption lines, is possible. A wide variety of optical spectral types is found. Besides ‘classical’ BL Lacs (42), BL Lac candidates (5) and high-power flat spectrum radio quasars (67), a significant number of ‘passive’ elliptical galaxies (41) is also found. Moreover, 33 broad emission line objects with a low radio power are discovered, suggesting that at least a fraction (∼ per cent) of low-power blazars have a broad line region. Finally, 34 objects showing only narrow emission lines, either as a result of some starburst activity in the host galaxy or as a result of the presence of an active galactic nucleus, appear in the sample." @default.
- W2146321325 created "2016-06-24" @default.
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- W2146321325 date "2002-02-01" @default.
- W2146321325 modified "2023-10-18" @default.
- W2146321325 title "The CLASS blazar survey — II. Optical properties" @default.
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- W2146321325 doi "https://doi.org/10.1046/j.1365-8711.2002.05062.x" @default.
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