The C-Band All-Sky Survey (C-BASS): Design and implementation of the northern receiver

Abstract

The C-Band All-Sky Survey (C-BASS) is a project to map the full sky in total intensity and linear polarization at 5 GHz. The northern component of the survey uses a broadband single-frequency analogue receiver fitted to a 6.1-m telescope at the Owens Valley Radio Observatory in California, USA. The receiver architecture combines a continuous-comparison radiometer and a correlation polarimeter in a single receiver for stable simultaneous measurement of both total intensity and linear polarization, using custom-designed analogue receiver components. The continuous-comparison radiometer measures the temperature difference between the sky and temperature-stabilized cold electrical reference loads. A cryogenic front-end is used to minimize receiver noise, with a system temperature of $\approx 30$K in both linear polarization and total intensity. Custom cryogenic notch filters are used to counteract man-made radio frequency interference. The radiometer $1/f$ noise is dominated by atmospheric fluctuations, while the polarimeter achieves a $1/f$ noise knee frequency of 10 mHz, similar to the telescope azimuthal scan frequency.

15 pages, 15 figures, submitted to MNRAS

References in corpus (9)

• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Foreground Polarization
• The QUIET Instrument
• Galactic foreground contributions to the WMAP5 maps
• Map-making in small field modulated CMB polarisation experiments: approximating the maximum-likelihood method
• Foreground Analysis Using Cross-Correlations of External Templates on the 7-year WMAP data
• Design, development and verification of the 30 and 44 GHz front-end modules for the Planck Low Frequency Instrument
• The C-Band All-Sky Survey: Instrument design, status, and first-look data
• A Circularly Symmetric Antenna Design With High Polarization Purity and Low Spillover

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