C-BASS: C-Band All-Sky Survey

Details C-BASS: C-Band All-Sky Survey C-BASS: C-Band All-Sky Survey

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9003p&link_type=abstract

American Astronomical Society, AAS Meeting #211, #90.03; Bulletin of the American Astronomical Society, Vol. 39, p.883

Astronomy and Astrophysics

Astronomy

3

Scientific paper

C-BASS is a project to image the whole sky at 5 GHz, measuring both brightness and polarization. The C-BASS receiver, currently under construction, is a hybrid of a broad-band (1 GHz) correlation polarimeter and a correlation radiometer. The polarimeter design is optimized for extremely low cross-polarization, while the radiometer uses temperature-stabilized 4 K loads to allow accurate total power measurements. In order to cover the whole sky, it will be mounted on two separate telescopes: a 6.1-m at the Owens Valley Radio Observatory in California, and a 7.6-m in South Africa. The survey resolution will be 0.85 deg with a sensitivity of < 0.1 mK/beam rms in Stokes I, Q, and U.
The C-BASS survey will be the first survey of diffuse Galactic emission at a frequency low enough to be dominated by synchrotron radiation but high enough to be uncorrupted by Faraday rotation effects. The all-sky maps produced by the survey will be key to enabling accurate subtraction of foreground contaminating signals from higher-frequency CMB polarization sky surveys, including WMAP and Planck. The C-BASS survey will also be a major resource for studying the interstellar medium and magnetic field of the Galaxy.
The C-BASS project is a collaboration between Caltech/JPL in the US, Oxford and Manchester Universities in the UK, and Rhodes University and the Hartebeesthoek Radio Astronomy Observatory in South Africa. It is funded by the NSF (AST-0607857) and the participating institutions.
http://www.astro.caltech.edu/cbass/

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