On the calibration of full-polarization 86GHz global VLBI observations
Artikel i vetenskaplig tidskrift, 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.

3c-279

generation

radio continuum: general

86 ghz

black-hole

instrumentation: interferometers

quasars

techniques: interferometric

polarimetry

wavelength

jet

Författare

Ivan Marti-Vidal

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

T. P. Krichbaum

Max Planck-institutet

A. Marscher

Boston University

W. Alef

Max Planck-institutet

A. Bertarini

Universität Bonn

Max Planck-institutet

U. Bach

Max Planck-institutet

F. K. Schinzel

Max Planck-institutet

University of New Mexico

H. Rottmann

Max Planck-institutet

J. M. Anderson

Max Planck-institutet

A.J. Zensus

Max Planck-institutet

M. Bremer

Institut de RadioAstronomie Millimetrique (IRAM)

S. Sanchez

Instituto de Radioastronomia Milimetrica

Michael Lindqvist

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Ari Mujunen

Aalto-Yliopisto

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 542 A107- A107

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

Infrastruktur

Onsala rymdobservatorium

DOI

10.1051/0004-6361/201218958