K. I. Kellermann - National Radio Astronomy Observatory
J. A. Zensus - Max-Planck-Institut fur Radioastronomie
R. C. Vermeulen - Netherlands Foundation for Radio Astronomy
M. H. Cohen - California Institute of Technology
Contents:
The 2cm Survey
Publications from the Survey
Contour Maps / Complete until 1998-March.
We are using the NRAO's Very Long Baseline Array for an imaging survey of compact radio sources at 2cm (15 GigaHertz).
The primary scientific interests in the survey are:
Morpholgy of parsec-scale structure Statistics of apparent superluminal motions Improved resolution over surveys at longer wavelengths, e.g. the Pearson-Readhead and Caltech-Jodrell Surveys. See also the USNO Radio Reference Frame Image Database. Tests of relativistic beaming models Cosmological tests using the angular size-redshift relationship
So far, we have observed 132 sources repeatedly, in 11 observing sessions during 1994-1998 (each of 24 or 48-hour duration).
The observations are performed in a "snapshot" observing mode (1 scan per hour of 3-4 minute duration, over a 8 hour period). We achieve a dynamic range of typically exceeding 1000:1, with a typical noise limit (rms) of 0.35 milli-Jansky.
K. I. Kellermann, R.C. Vermeulen, J.A. Zensus, & M. H. Cohen 1998: Sub- Milliarcsecond Imaging of Quasars and AGN. Astronomical Journal 115:1295-1318 (1988). This paper covers the first phase of the survey.
Below are links to contour maps of naturally-weighted images from the survey. We are striving to make these available soon after data analysis is completed. We ask that you contact us if you would like to use or reproduce these images in any way. No reference should be made to any of these images without our explicit prior permission. Please direct all questions regarding the survey to Ken Kellermann (kkellerm@nrao.edu) or Anton Zensus (azensus@mpifr-bonn.mpg.de).
The contour maps are presented here as postscript files. The date of observation is printed on each map.
Go to the map directory in Charlottesville, USA
Go to the map directory in Bonn, Germany
azensus@mpifr-bonn.mpg.de
Last modified 1/29/1999.