On the calibration of full-polarization 86GHz global VLBI observations
Journal article, 2012
We report the development of a semi-automatic pipeline for the calibration of 86GHz full-polarization observations performed with the Global Millimeter-VLBI array (GMVA) and describe the calibration strategy followed in the data reduction. Our calibration pipeline involves non-standard procedures, since VLBI polarimetry at frequencies above 43GHz has not yet been well established. We also present, for the first time, a full-polarization global-VLBI image at 86GHz (source 3C 345), as an example of the final product of our calibration pipeline, and discuss the effect of instrumental limitations on the fidelity of the polarization images. Our calibration strategy is not exclusive to the GMVA, and could be applied to other VLBI arrays at millimeter wavelengths. The use of this pipeline will allow GMVA observers to obtain fully calibrated datasets shortly after the data correlation.
jet
quasars
radio continuum: general
3c-279
polarimetry
techniques: interferometric
instrumentation: interferometers
wavelength
black-hole
generation
86 ghz
Author
Ivan Marti-Vidal
Chalmers, Earth and Space Sciences, Onsala Space Observatory
T. P. Krichbaum
Max Planck Society
A. Marscher
Boston University
W. Alef
Max Planck Society
A. Bertarini
Max Planck Society
University of Bonn
U. Bach
Max Planck Society
F. K. Schinzel
University of New Mexico
Max Planck Society
H. Rottmann
Max Planck Society
J. M. Anderson
Max Planck Society
A.J. Zensus
Max Planck Society
M. Bremer
Institut de Radioastronomie Millimétrique (IRAM)
S. Sanchez
Institut de Radioastronomie Millimétrique (IRAM)
Michael Lindqvist
Chalmers, Earth and Space Sciences, Onsala Space Observatory
Ari Mujunen
Aalto University
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 542 A107- A107Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
Infrastructure
Onsala Space Observatory
DOI
10.1051/0004-6361/201218958