A multi-epoch VLBI survey of the kinematics of CJF sources. I. Model-fit parameters and maps
Abstract
Context: This is the first of a series of papers presenting VLBI observations of the 293 Caltech-Jodrell Bank Flat-Spectrum (hereafter CJF) sources and their analysis.
Aims: One of the major goals of the CJF is to make a statistical study of the apparent velocities of the sources.
Methods: We have conducted global VLBI and VLBA observations at 5 GHz since 1990, accumulating thirteen separate observing campaigns.
Results: We present here an overview of the observations, give details of the data reduction and present the source parameters resulting from a model-fitting procedure. For every source at every observing epoch, an image is shown, built up by restoring the model-fitted components, convolved with the clean beam, into the residual image, which was made by Fourier transforming the visibility data after first subtracting the model-fitted components in the uv-plane. Overplotted we show symbols to represent the model components.
Conclusions: We have produced VLBI images of all but 5 of the 293 sources in the complete CJF sample at several epochs and investigated the kinematics of 266 AGN.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 2007
- DOI:
- arXiv:
- arXiv:0802.4182
- Bibcode:
- 2007A&A...472..763B
- Keywords:
-
- techniques: interferometric;
- surveys;
- galaxies: active;
- radio continuum: galaxies;
- Astrophysics
- E-Print:
- Figure 1 and Table 2 are only available in electronic form at the CDS and soon at http://www.mpifr-bonn.mpg.de/staff/sbritzen/cjf.html