An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background

Details An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background

2001-11-14

arxiv.org/abs/astro-ph/0111276v2

Astrophys.J.Suppl. 144 (2002) 1-20

Astronomy and Astrophysics

Astrophysics

Replaced with revised version. Accepted for publication in ApJSS January 2003

Scientific paper

10.1086/344522

We describe the design and performance of a microwave polarimeter used to make precision measurements of polarized astrophysical radiation in three microwave frequency bands spanning 26-36 GHz. The instrument uses cooled HEMT amplifiers in a correlation polarimeter configuration to achieve high sensitivity and long-term stability. The instrument demonstrates long term stability and has produced the most restrictive upper limits to date on the large angular scale polarization of the 2.7 K cosmic microwave background radiation.

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