A Caltech Library Service

Further redshifts of 1-Jy radio sources

Allington-Smith, J. R. and Spinrad, H. and Djorgovski, S. and Liebert, J. (1988) Further redshifts of 1-Jy radio sources. Monthly Notices of the Royal Astronomical Society, 234 (4). pp. 1091-1103. ISSN 0035-8711. doi:10.1093/mnras/234.4.1091.

[img] PDF (ADS) - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We have firm redshifts for a further 12 faint radio source identifications from the ‘1-Jy’ complete radio-selected sample, two of which are galaxies with redshifts z > 1.5. Another object has a provisional redshift that requires confirmation. Five of these identifications had previously been classified as QSOs on the basis of their optical morphology. Our spectroscopy shows that of these, one is definitely a galaxy and two have characteristics intermediate between those of ‘normal’ radio galaxies and those of ‘normal’ quasars, for instance broad Balmer emission but an extended optical image. Two of the eight identifications previously classified as galaxies have similar ‘intermediate’ properties. The remaining identifications have low-excitation narrow emission-line systems of the type seen in other 1-Jy radio sources by Allington-Smith et al. We confirm that the 1-Jy emission lines are a factor 2 weaker than those of 3C galaxies in the same redshift interval.

Item Type:Article
Related URLs:
URLURL TypeDescription
Djorgovski, S.0000-0002-0603-3087
Additional Information:© 1988 Royal Astronomical Society. Provided by the NASA Astrophysics Data System. Based on data obtained at the Isaac Newton Group of Telescopes of the Roque de Los Muchachos Observatory, La Palma; Lick Observatory, University of California and the Multiple Mirror Telescope, a joint facility of the Smithsonian Institution and the University of Arizona. We thank Pat McCarthy, Kate Ebneter and Michael Strauss for assistance with the reduction of the Kitt Peak and Lick data and Hugo Schwarz, Alan Purvis and Ian Parry for assistance with the La Palma observations. We are grateful to the staff of the KPNO, Lick, MMT and La Palma observatories for their professional help in obtaining the data.
Issue or Number:4
Record Number:CaltechAUTHORS:20190806-145426168
Persistent URL:
Official Citation:J. R. Allington-Smith, H. Spinrad, S. Djorgovski, J. Liebert, Further redshifts of 1-Jy radio sources, Monthly Notices of the Royal Astronomical Society, Volume 234, Issue 4, 1 October 1988, Pages 1091–1103,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97680
Deposited By: Tony Diaz
Deposited On:07 Aug 2019 17:17
Last Modified:16 Nov 2021 17:33

Repository Staff Only: item control page