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Proceedings / Volume 7741 / Poster Session: CMB Instruments I: Current and Near Term

Responsivity calibration of the QUIET Q-Band array

Proc. SPIE 7741, 77412N (2010); http://dx.doi.org/10.1117/12.856735

Tuesday 29 June 2010
San Diego, California, USA
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
Wayne S. Holland, Jonas Zmuidzinas
Robert N. Dumoulin

Columbia Univ. (USA)

The Q/U Imaging ExperimenT (QUIET), a ground-based experiment located in the Atacama Desert in Chile, measures the polarization of the Cosmic Microwave Background (CMB). In Phase I, it measures the CMB polarization at angular scales of 25 (see manuscript) l (see manuscript) 1000 using radiometer arrays in the Q (44 GHz) and W (95 GHz) frequency bands. The Q-band and W-band receivers of Phase I of the QUIET instrument contain 2 and 6 total power modules (TT modules), and 17 and 84 polarization modules respectively. Responsivities for the TT modules are obtained primarily from Jupiter and skydip measurements, using Jupiter as the absolute calibrator and the more frequent skydip measurements to track short time-scale fluctuations over the course of the season. Responsivities for the polarization modules are obtained from Tau A, relative measurements from the Moon, a polarizing wire-grid, and skydips. Skydips are used to track the responsivity of the polarization modules on a shorter time-scale.

© 2010 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

History
Online Jul 15, 2010
Digital Object Identifier
http://dx.doi.org/10.1117/12.856735
Citation
Robert N. Dumoulin, "Responsivity calibration of the QUIET Q-Band array", Proc. SPIE 7741, 77412N (2010); http://dx.doi.org/10.1117/12.856735

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