Radio-loud QSOs at z~4 (Holt+, 2004)

Details Radio-loud QSOs at z~4 (Holt+, 2004) Radio-loud QSOs at z~4 (Holt+, 2004)

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ycat..73480857h&link_type=abstract

VizieR On-line Data Catalog: J/MNRAS/348/857. Originally published in: 2004MNRAS.348..857H

Physics

Qsos, Redshifts, Photometry, Radio Lines, Spectroscopy

Scientific paper

Observations of 54 of the 194 candidates were reported in Paper I, Benn et al., 2002MNRAS.329..221B. The 55th object reported there, 1349+38, is actually detected on the Minnesota APS scan of the POSS-I blue plate (i.e. it is not red), and thus does not meet selection criterion (red also in the Minnesota APS (Pennington et al. catalogue of the POSS-I plates, 1993PASP..105..521P). Spectra were obtained of 60 more candidates using the IDS spectrograph on the Isaac Newton Telescope during near-photometric nights (occasional light cirrus) in 2001 May. Some of the 194 candidates were imaged through a Harris R filter with the 1.0-m Jacobus Kapteyn Telescope (JKT) in service time, in order to identify extended objects. Spectra were later obtained of most of these candidates at the Isaac Newton Telescope (INT), but the 'G' (galaxy) classifications of four objects in Table 2 are based on JKT imaging alone. The 13 z>3.6 QSOs with S1.4GHz>3mJy were observed at 4.85 and 10GHz, with the Effelsberg radio telescope, during the night of 2002 January 13.
(2 data files).

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