High-frequency radio polarization measurements of WMAP point sources

Abstract

We present polarization measurements at 8.4, 22, and 43 GHz made with the VLA of a complete sample of extragalactic sources stronger than 1 Jy in the 5-year WMAP catalogue and with declinations north of -34 degrees. The observations were motivated by the need to know the polarization properties of radio sources at frequencies of tens of GHz in order to subtract polarized foregrounds for future sensitive Cosmic Microwave Background (CMB) experiments. The total intensity and polarization measurements are generally consistent with comparable VLA calibration measurements for less-variable sources, and within a similar range to WMAP fluxes for unresolved sources. A further paper will present correlations between measured parameters and derive implications for CMB measurements.

16 pages, 5 figures. Accepted by MNRAS. Two large figures are available at http://www.jb.man.ac.uk/~njj/pol_maps and http://www.jb.man.ac.uk/~njj/pol_spec

References in corpus (6)

• The Wilkinson Microwave Anisotropy Probe (WMAP) Source Catalog
• Magnetic Fields in the Center of the Perseus Cluster
• The Australia Telescope 20 GHz (AT20G) Survey: The Bright Source Sample
• A survey of polarization in the JVAS/CLASS flat-spectrum radio source surveys: I. The data and catalogue production
• The extragalactic radio-source population at 95 GHz
• Some estimates of the source counts at Planck Surveyor frequencies, using the 9C survey at 15 GHz

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• The impact of polarized extragalactic radio sources on the detection of CMB anisotropies in polarization
• Spatially resolved origin of mm-wave linear polarization in the nuclear region of 3C 84
• Statistical properties of polarized radio sources at high frequency and their impact on CMB polarization measurements
• The interpretation of Rotation Measures in the presence of inhomogeneous foreground screens
• Forecasting Polarized Radio Sources for CMB observations
• The extent of magnetic fields around galaxies out to z ~ 1
• A Polarisation Survey of Bright Extragalactic AT20G Sources
• Statistics of the fractional polarisation of compact radio sources in Planck maps
• Simulated catalogs and maps of radio galaxies at millimeter wavelengths in Websky
• Average fractional polarization of extragalactic sources at Planck frequencies
• Kolmogorov analysis detecting radio and Fermi gamma-ray sources in cosmic microwave background maps
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• One Centimetre Receiver Array-prototype observations of the CRATES sources at 30 GHz
• The Q/U Imaging Experiment: Polarization Measurements of Radio Sources at 43 and 95 GHz
• A Bayesian method for point source polarization estimation
• QUIJOTE scientific results -- IX. Radio sources in the QUIJOTE-MFI wide survey maps
• Simulations and Observations of the Microwave Universe
• 28 -- 40 GHz variability and polarimetry of bright compact sources in the QUIJOTE cosmological fields