VLBA Calibrator Survey 6 (VCS6)

Summary

Here is the sixth extension to the Very Long Baseline Array (VLBA) Calibrator Survey, containing images and positions of 264 compact radio sources. Among them, 165 new sources were not previously observed with very long baseline interferometry (VLBI) under absolute astrometry and geodesy programs and 98 other targeted sources were observed in previous experiments but had poor positions. New observations significantly improved estimates of their coordinates.

Publication

L. Petrov, Y.Y. Kovalev, E. Fomalont, D. Gordon "The Fourth VLBA Calibrator Survey - VCS6", Astronomical Journal, vol. 136, p. 580, 2008.    Preprint: http://arXiv.org/abs/0801.3895      PDF-file(346 Kb).

Observations

There were two observing sessions, each 24 hour long: VCS6a and VCS6b:

VCS6a was observed from 2006.12.18_17:50:07 through 2006.12.19_16:55:23
VCS6b was observed from 2007.01.11_18:31:23 through 2007.01.12_18:27:08

Date Experiment Session URL for downloading Size (bytes)
2006.12.18 bp133a $06DEC18XV ftp://cddis.gsfc.nasa.gov/vlbi/raw/fits/2006_12_18_bp133a_fits.tar.bz2 17,430,400,863
2007.01.11 bp133b $07JAN11XV ftp://cddis.gsfc.nasa.gov/vlbi/raw/fits/2007_01_11_bp133b_fits.tar.bz2 15,081,746,536

Results

  1. VCS6 catalogue in HTML form. The catalogue contains positions of 264 targeted sources, their uncertainties, estimates of the total VLBA flux density, the VLBA flux density of unresolved components, naturally weighted CLEAN images in postscript and in fits format at X and S-band; plots of the correlated flux density as a function of the length of the baseline projection to the source plane; fits files with calibrated uv data.

  2. VCS6 catalogue in ASCII format. The catalogue contains source positions, their uncertainties, total VLBA flux density, the VLBA flux density of unresolved components.

  3. Catalogue in HTML form of 63 sources used as tropospheric calibrators. The catalogue contains source positions, their uncertainties, estimates of the total VLBA flux density, the VLBA flux density of unresolved components, naturally weighted CLEAN images in postscript and in fits format at X and S-band; plots of the correlated flux density as a function of the length of the baseline projection to the source plane; fits files with calibrated uv data.

  4. Catalogue in ASCII format of 63 sources used as tropospheric calibrators.

  5. All images and uv data in one tar.bz2 file (1712Mb). Refer to the readme file for the file name convention in this archive.

  6. List of 165 new sources detected in the VCS6 observing campaign which were not observed before with VLBI under absolute astrometry and geodesy programs.

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Last update: 31-JAN-2008 11:09:30
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