On the calibration of full-polarization 86GHz global VLBI observations

被引：33

作者：

Marti-Vidal, I. ^{[1
,2
]}

Krichbaum, T. P. ^{[1
]}

Marscher, A. ^{[3
]}

Alef, W. ^{[1
]}

Bertarini, A. ^{[1
,4
]}

Bach, U. ^{[1
]}

Schinzel, F. K. ^{[1
]}

Rottmann, H. ^{[1
]}

Anderson, J. M. ^{[1
]}

Zensus, J. A. ^{[1
]}

Bremer, M. ^{[5
]}

Sanchez, S. ^{[6
]}

Lindqvist, M. ^{[2
]}

Mujunen, A. ^{[7
]}

机构：

[1] Max Planck Inst Radioastron MPIfR, D-53121 Bonn, Germany

[2] Chalmers, Onsala Space Observ, S-43992 Onsala, Sweden

[3] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA

[4] Univ Bonn, Inst Geodesy & Geoinformat, D-53115 Bonn, Germany

[5] Inst Radioastron Millimetr IRAM, F-38406 St Martin Dheres, France

[6] Inst Radioastron Millimetr IRAM, Granada 18012, Spain

[7] Aalto Univ, Metsahovi Radio Observ, Kylmala 02540, Finland

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 542卷

关键词：

instrumentation: interferometers; techniques: interferometric; radio continuum: general; BLACK-HOLE; 86; GHZ; POLARIMETRY; GENERATION; WAVELENGTH; QUASARS; 3C-279; JET;

D O I：

10.1051/0004-6361/201218958

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：10

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