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The First Caltech-Jodrell Bank VLBI Survey. III. VLBI and MERLIN Observations at 5 GHz and VLA Observations at 1.4 GHz

Xu, W. and Readhead, A. C. S. and Pearson, T. J. and Polatidis, A. G. and Wilkinson, P. N. (1995) The First Caltech-Jodrell Bank VLBI Survey. III. VLBI and MERLIN Observations at 5 GHz and VLA Observations at 1.4 GHz. Astrophysical Journal Supplement Series, 99 . pp. 297-348. ISSN 0067-0049. doi:10.1086/192189.

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We present the 5 GHz results from the first Caltech-Jodrell Bank (CJ1) VLBI survey. The 1.6 GHz maps were presented in two separate papers (Polatidis et al. 1995; Thakkar et al. 1995). These three papers complete the first stage of this program to map at both 1.6 and 5 GHz all objects accessible to Mark II VLBI in the complete sample of 135 objects with 1.3 > S_(5 GHz) ≥ 0.7 Jy, δ(1950) ≥ 35°, and |b| > 10°. The combination of the CJ1 sample with the Pearson-Readhead (PR) sample provides a complete, flux density-limited sample of 200 objects with S_(5 GHz) ≥ 0.7 Jy, δ(1950) ≥35°, and |b| > 10° for which all of the objects accessible to Mark II VLBI have been mapped at both 5 GHz(129 objects) and 1.6 GHz(132 objects). In addition to the 5 GHz VLBI maps, we present in this paper 5 GHz MERLIN observations of 20 objects and 1.4 GHz VLA observations of 92 objects in the combined CJ1 + PR sample. The VLA maps, together with L- band (1.3-1.7 GHz) maps available in the literature, provide a complete set of VLA maps for the combined CJ1 + PR sample. Finally, we present the radio spectra of the objects in the CJ1 sample. The combined CJ1 + PR VLBI surveys provide a sample which is large enough for a number of important astrophysical and cosmological studies. These will be presented in further papers in this series.

Item Type:Article
Related URLs:
URLURL TypeDescription
Readhead, A. C. S.0000-0001-9152-961X
Pearson, T. J.0000-0001-5213-6231
Additional Information:© 1995 The American Astronomical Society. Received 1994 November 28; accepted 1995 January 26. We thank the staffs of the observatories in the European and the US VLBI networks and the staff of the JPL/Caltech Block 2 correlator for their assistance during the CJl survey. We also thank R. C. Vermeulen and G. B. Taylor for their help with fringe-fitting and automatic mapping and G. B. Taylor and D. R. Henstock for observing six objects for us. A. G. P. acknowledges the receipt of a British Council Fellowship for the year 1991. The work at the California Institute of Technology was supported by the National Science Foundation (grants AST-8814554 and AST-9117100). The VLA and VLBA are instruments of the National Radio Astronomy Observatory, which is operated by Associated Universities, Inc., under cooperative agreement with the National Science Foundation.
Funding AgencyGrant Number
British Council FellowshipUNSPECIFIED
Subject Keywords:quasars: general - radio continuum: galaxies - surveys
Record Number:CaltechAUTHORS:20151103-155328462
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61804
Deposited By: Tony Diaz
Deposited On:04 Nov 2015 00:15
Last Modified:10 Nov 2021 22:54

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