101 citations · 236 across the 4 of their papers we have counts for
6 papers
Observations of the Goldreich-Kylafis effect in star-forming regions with XPOL at the IRAM 30m telescope
Jan Forbrich, Helmut Wiesemeyer, Clemens Thum +2
The Goldreich-Kylafis (GK) effect causes certain molecular line emission to be weakly linearly polarized, e.g., in the presence of a magnetic field. Compared to polarized dust emis…
A new activity phase of the blazar 3C 454.3. Multifrequency observations by the WEBT and XMM-Newton in 2007-2008
C. M. Raiteri, M. Villata, V. M. Larionov +2
We present and analyse the WEBT multifrequency observations of 3C 454.3 in the 2007-2008 observing season, including XMM-Newton observations and near-IR spectroscopic monitoring, a…
XPOL - the correlation polarimeter at the IRAM 30m telescope
Clemens Thum, Helmut Wiesemeyer, Gabriel Paubert +2
XPOL, the first correlation polarimeter at a large millimeter telescope, uses a flexible digital correlator to measure all four Stokes parameters simultaneously, i.e. the total pow…
The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT during the AGILE detection
C. M. Raiteri, M. Villata, W. P. Chen +5
The quasar-type blazar 3C 454.3 underwent a phase of high activity in summer and autumn 2007, which was intensively monitored in the radio-to-optical bands by the Whole Earth Blaza…
Full polarization study of SiO masers at 86 GHz
Fabrice Herpin, Alain Baudry, Clemens Thum +2
We study the polarization of the SiO maser emission in a representative sample of evolved stars in order to derive an estimate of the strength of the magnetic field, and thus deter…
The polarization of mm methanol masers
Helmut Wiesemeyer, Clemens Thum, Malcolm Walmsley
We present a survey of the polarization properties of mm-wavelength methanol masers, comprising both classes, and transitions from 84.5 to 157.0 GHz. Linear polarization is found i…