C.D.S. - SIMBAD4 rel 1.7 - 2020.06.01CEST07:07:21

2016A&A...593A..61M - Astronomy and Astrophysics, volume 593A, 61-61 (2016/9-1)

Dual differential polarimetry. A technique to recover polarimetric information from dual-polarization observations.


Abstract (from CDS):

Current mm/submm interferometers, like the Atacama Large mm/submm Array (ALMA), use receivers that register the sky signal in a linear polarization basis. In the case of observations performed in full-polarization mode (where the cross-correlations are computed among all the polarization channels) it is possible to reconstruct the full-polarization brightness distribution of the observed sources, as long as a proper calibration of delay offsets and leakage among polarization channels can be performed. Observations of calibrators, preferably with some linear polarization, with a good parallactic angle coverage are usually needed for such a calibration. In principle, dual-polarization observations only allow us to recover the Stokes I intensity distribution of the sources, regardless of the parallactic angle coverage of the observations. In this paper, we present a novel technique of dual differential polarimetry that makes it possible to obtain information related to the full-polarization brightness distribution of the observed sources from dual-polarization observations. This technique is inspired in the Earth-rotation polarization synthesis and can be applied even to sources with complex structures.

Abstract Copyright: © ESO, 2016

Journal keyword(s): instrumentation: interferometers - techniques: interferometric - techniques: polarimetric

Status at CDS:  

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3764 4
2 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3699 1

    Equat.    Gal    SGal    Ecl

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