CaltechAUTHORS
Published August 2002 | Version Published + Submitted
Journal Article Open

Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei. II. Additional Sources

Creators

  • 1. ROR icon National Radio Astronomy Observatory
  • 2. ROR icon Max Planck Institute for Radio Astronomy
  • 3. ROR icon California Institute of Technology
  • 4. ROR icon Netherlands Institute for Radio Astronomy

Abstract

We report further results from our imaging survey at 15 GHz (λ = 2 cm) with the Very Long Baseline Array (VLBA). This paper presents single-epoch images for 39 sources, bringing the total number of objects in the sample to 171. Our sample is representative of a complete unbiased sample, and it will be used for statistical analysis of source properties. We compare the observed brightness temperatures derived from our VLBA observations with those derived from total intensity variations at 22 and 37 GHz. These are consistent with intrinsic brightness temperatures in the range 10^(10)–10(12) K. We also present three new spectroscopic redshift values: z = 0.517 ± 0.001 for 0026+346, z = 1.591 ± 0.003 for 0727-115, and z = 0.2016 ± 0.0004 for 1155+251.

Additional Information

© 2002. The American Astronomical Society. Received 2002 February 22; accepted 2002 April 30. J. A. Z. was supported for this research through a Max-Planck Research Award. This research has made use of data from the University of Michigan Radio Astronomy Observatory (supported by funds from the University of Michigan); the USNO Radio Reference Frame Image Database (RRFID); the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration; and the SIMBAD database, operated at CDS, Strasbourg, France. H. M. Aller, M. C. Aller, J. Armstrong, D. C. Homan, M. L. Lister, A. P. Lobanov, M. Russo, and R. West provided valuable help and important suggestions. R. W. Goodrich and G. B. Taylor collaborated in the optical observations reported in the Appendix.

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Additional details

Identifiers

Eprint ID
76125
Resolver ID
CaltechAUTHORS:20170408-160532910

Related works

Describes
http://arxiv.org/abs/astro-ph/0205076 (URL)

Funding

Max-Planck-Gesellschaft
NASA/JPL/Caltech

Dates

Created
2017-06-15
Created from EPrint's datestamp field
Updated
2021-11-15
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Infrared Processing and Analysis Center (IPAC)