Redshifts for flat-spectrum radio sources in the second Caltech-Jodrell Bank VLBI sample

Details Redshifts for flat-spectrum radio sources in the second Caltech-Jodrell Bank VLBI sample Redshifts for flat-spectrum radio sources in the second Caltech-Jodrell Bank VLBI sample

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.290..380h&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 290, Issue 2, pp. 380-400.

Astronomy and Astrophysics

Astronomy

32

Bl Lacertae Objects: General, Galaxies: Distances And Redshifts, Galaxies: General, Quasars: Emission Lines, Quasars: General, Radio Continuum: General

Scientific paper

We present optical spectra and redshifts for flat-spectrum radio sources taken from the second Caltech-Jodrell Bank VLBI sample. The sources were observed using the Faint Object Spectrograph on the Isaac Newton Telescope. We show optical spectra for 90 sources, out of a total of 101 observed; of the remaining 11 sources, nine were not detected, and two were mis-identified. Definite redshifts have been determined for 60 sources, and a further seven have probable redshifts determined. Five sources are shown to have featureless BL Lac type spectra, and 18 sources are too weak to give a reliable redshift.

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