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

D. R. Henstock, I. W A Browne, P. N. Wilkinson, R. G. McMahon

    Research output: Contribution to journalArticlepeer-review

    Abstract

    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 misidentified. 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. © 1997 RAS.
    Original languageEnglish
    Pages (from-to)380-400
    Number of pages20
    JournalMonthly Notices of the Royal Astronomical Society
    Volume290
    Issue number2
    Publication statusPublished - 1997

    Keywords

    • BL Lacertae objects: general
    • Galaxies: distances and redshifts
    • Galaxies: general
    • Quasars: emission lines
    • Quasars: general
    • Radio continuum: general

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