[170.13] CMB Foreground Surveys with the New Sensitive Wideband Continuum Backend on the Green Bank Telescope

AAS 207th Meeting, 8-12 January 2006
Session 170 Cosmology, Early Universe, Cosmic Distance Scale
Poster, Thursday, 9:20am-4:00pm, January 12, 2006, Exhibit Hall

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[170.13] CMB Foreground Surveys with the New Sensitive Wideband Continuum Backend on the Green Bank Telescope

B. Mason (NRAO), L. Weintraub, T. Pearson (Caltech), J. Sievers (CITA), M. Shepherd, A. Readhead (Caltech)

The California Institute of Technology and the National Radio Astronomy Observatory have constructed a new continuum backend for use with the 26 to 40 GHz pseudo-correlation receiver on the Green Bank Telescope (GBT). The backend simultaneously measures RF power across the full 14 GHz receiver band in two feeds and two polarizations, and is capable of executing a rapid beam switch to suppress the effects of receiver gain fluctuations. Combined with the GBT's large and excellent surface the CCB will give unprecedented cm-wave sensitivity to study CMB discrete-source foregrounds and very small-scale anisotropies. We present an overview of the instrument and our early science program, which aims to more precisely measure the small-scale excess power seen by the Cosmic Background Imager.

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