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| == Polarimetry at the 30m telescope == | = Polarimetry at the 30m telescope (under construction) = This site collects information relevant to polarimetric observations at the IRAM 30m telescope. == Observing == == Beam maps == == Documents == * Versatile IF polarimeter at the IRAM 30m telescope [[http://adsabs.harvard.edu/abs/spie.ps|Thum et al. 2003]] including the first mjm observation of the polarization of the moon's limb * XPOL—the Correlation Polarimeter at the IRAM 30-m Telescope [[attachment:thum_2008_xpol.pdf|Thum et al. 2008]], PASP, 120, 777 * Polarimetry with EMIR/XPOL - commisioning report (August 2010) [[attachment:wiesemeyer-2010-polarimetry-v3.pdf|Wiesemeyer & Thum 2010, IRAM Report]] * Measurement of the Crab nebula polarization at 90 GHz as a calibrator for CMB experiments [[http://adsabs.harvard.edu/abs/2010A%26A...514A..70A|Aumont et al. 2010]] * A sensitive upper limit to the circular polarization of the Crab nebula at λ3 mm [[http://adsabs.harvard.edu/abs/2011A&A...528A..11W|Wiesemeyer et al. 2011]] * Observations of the Goldreich-Kylafis effect in star-forming regions with XPOL at the IRAM 30 m telescope [[http://adsabs.harvard.edu/abs/2008A&A...492..757F|Forbrich et al. 2008]] This publication includes examples for assessing the magnitude of instrumental polarization due to sidelobes == Background material == * IAU definition of Stokes Parameters [[attachment:IAUdefs.pdf|They are found here.]] Radioastronomy, including the 30m telescope, uses these definitions. Note however that according to this definition the sign of Stokes V is opposite to the convention in classical optics as described by [[attachment:bornWolf.pdf|Born & Wolf in "Classical Optics"]] * The sign of Stokes V in 30m observations with XPOL has been determined through several methods. They are described in [[attachment:stokesVweb.ps| this short note.]] Stokes V spectra generated by the data acquisition program have the correct sign according to the IAU convention. |
Contents
Polarimetry at the 30m telescope (under construction)
This site collects information relevant to polarimetric observations at the IRAM 30m telescope.
Observing
Beam maps
Documents
- Versatile IF polarimeter at the IRAM 30m telescope
Thum et al. 2003 including the first mjm observation of the polarization of the moon's limb
- XPOL—the Correlation Polarimeter at the IRAM 30-m Telescope
Thum et al. 2008, PASP, 120, 777
- Polarimetry with EMIR/XPOL - commisioning report (August 2010)
- Measurement of the Crab nebula polarization at 90 GHz as a calibrator for CMB experiments
- A sensitive upper limit to the circular polarization of the Crab nebula at λ3 mm
- Observations of the Goldreich-Kylafis effect in star-forming regions with XPOL at the IRAM 30 m telescope
Forbrich et al. 2008 This publication includes examples for assessing the magnitude of instrumental polarization due to sidelobes
Background material
- IAU definition of Stokes Parameters
They are found here. Radioastronomy, including the 30m telescope, uses these definitions. Note however that according to this definition the sign of Stokes V is opposite to the convention in classical optics as described by Born & Wolf in "Classical Optics"
- The sign of Stokes V
in 30m observations with XPOL has been determined through several methods. They are described in this short note. Stokes V spectra generated by the data acquisition program have the correct sign according to the IAU convention.