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.



radio continuum: general



techniques: interferometric

instrumentation: interferometers




86 ghz


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- A107

Subject Categories

Astronomy, Astrophysics and Cosmology


Basic sciences


Onsala Space Observatory



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