Optical Spectroscopy of 1-JANSKY s4 and s5 Radio Sources - Part Four

Details Optical Spectroscopy of 1-JANSKY s4 and s5 Radio Sources - Part Four Optical Spectroscopy of 1-JANSKY s4 and s5 Radio Sources - Part Four

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..101..521s&link_type=abstract

Astronomy and Astrophysics Supplement, Vol.101, NO. 3/NOVI, P. 521, 1993

Astronomy and Astrophysics

Astrophysics

68

Scientific paper

The results of optical spectroscopy of 23 radio sources from the 1 Jy, S4, and S5 radio surveys are presented. New redshifts have been measured for 16 optical counterparts including a few objects, where spectral features with ambiguous identifications had previously been observed. For the gravitational lens candidate 0218+357, a lower limit for the redshift of z > 0.656 has been derived from narrow absorption lines. Several objects show featureless optical spectra, including a new, previously unknown BL Lac candidate. Direct imaging data are provided for a number of sources of special interest or with existing ambiguities about their identification.

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