A multi-epoch VLBI survey of the kinematics of CJF sources - I. Model-fit parameters and maps

被引:31
作者
Britzen, S.
Vermeulen, R. C.
Taylor, G. B.
Campbell, R. M.
Pearson, T. J.
Readhead, A. C. S.
Xu, W.
Browne, I. W. A.
Henstock, D. R.
Wilkinson, P.
机构
[1] Max Planck Inst Radioastron, D-53121 Bonn, Germany
[2] Netherlands Fdn Res Astron, ASTRON, NL-7990 AA Dwingeloo, Netherlands
[3] Landessternwarte Konigstuhl, D-69117 Heidelberg, Germany
[4] Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA
[5] Natl Radio Astron Observ, Socorro, NM 87801 USA
[6] Joint Inst VLBI Europe, NL-7991 PD Dwingeloo, Netherlands
[7] CALTECH, Dept Astron, Pasadena, CA 91125 USA
[8] Univ Manchester, Nuffield Radio Astron Labs, Jodrell Bank, Macclesfield SK11 9DL, Cheshire, England
关键词
techniques : interferometric; surveys; galaxies : active; radio continuum : galaxies;
D O I
10.1051/0004-6361:20052677
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
引用
收藏
页码:763 / 771
页数:9
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