A survey for high-redshift radio-loud quasars: optical spectroscopy of S > 0.2 Jy, flat-spectrum radio sources
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In this article, the authors present optical spectroscopic data for a complete sample of 161 S_5GHz >= 0.2 Jy, flat-spectrum radio sources, which were observed as part of a survey for high redshift, radio-loud quasars.Abstract:
We present optical spectroscopic data for a complete sample of 161 S_5GHz >= 0.2 Jy, flat-spectrum radio sources. The sources were observed as part of a survey for high redshift, radio-loud quasars, and were selected for spectroscopic follow-up based on criteria of red optical colour and unresolved optical counterpart, as measured from APM scans of POSS-I plates. 13 objects from the spectroscopic sample were found to be radio-loud quasars with z > 3, of which two were previously known. We give positions, E (red) magnitudes, O-E colours, 5GHz radio fluxes, radio spectral indices, optical spectra and redshifts where possible for the spectroscopic sample. We also give finding charts for the z > 3 QSOs. The highest redshift object found is a QSO with z = 4.30 (GB1508+5714, the subject of an earlier Letter). The sample also contains a z = 3.05 QSO, GB1759+7539, which is optically very luminous (E=16.1). In addition, spectra are given for 18 S_5GHz >= 0.2 Jy, flat-spectrum radio sources that do not form part of the complete sample.read more
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Mojave. x. parsec-scale jet orientation variations and superluminal motion in active galactic nuclei
Matthew L. Lister,M. F. Aller,Hugh D. Aller,Daniel C. Homan,K. I. Kellermann,Yuri Y. Kovalev,Yuri Y. Kovalev,Alexander B. Pushkarev,Alexander B. Pushkarev,J. L. Richards,Eduardo Ros,Eduardo Ros,Tuomas Savolainen +12 more
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MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
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TL;DR: In this article, the parsec-scale kinematics of 200 AGN jets based on 15 GHz VLBA data obtained between 1994 Aug 31 and 2011 May 1 are described.
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MOJAVE. XIII. PARSEC-SCALE AGN JET KINEMATICS ANALYSIS BASED ON 19 YEARS OF VLBA OBSERVATIONS AT 15 GHz
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TL;DR: In this article, the authors presented 1625 new 15 GHz (2 cm) VLBA images of 295 jets associated with active galactic nuclei (AGNs) from the MOJAVE and 2 cm surveys, spanning observations between 1994 Aug 31 and 2013 Aug 20.
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The Deep X-Ray Radio Blazar Survey. I. Methods and First Results*
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TL;DR: The Deep X-Ray Radio Blazar Survey (DXRBS) as discussed by the authors is a survey of flat-spectrum radio-loud quasars (FSRQs) and BL Lacertae objects.
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