Status Report

A dual output polarimeter devoted to the study of the Cosmic Microwave Background

By SpaceRef Editor
January 21, 2003
Filed under , ,

Astrophysics, abstract
astro-ph/0301350


From: G.Sironi <[email protected]>
Date: Fri, 17 Jan 2003 11:30:53 GMT (69kb)

A dual output polarimeter devoted to the study of the Cosmic Microwave
Background


Authors:
M.Gervasi,
G.Boella,
F.Cavaliere,
G.Grossetti,
A.Passerini,
G.Sironi,
A.Tartari,
M.Zannoni

Comments: 12 pages, 6 figures, in print on the Proc. SPIE Conf. – August 2002


We have developed a correlation radiometer at 33 GHz devoted to the search
for residual polarization of the Cosmic Microwave Background (CMB). The two
instruments`s outputs are linear combination of two Stokes Parameters (Q and U
or U and V). The instrument is therefore directly sensitive to the polarized
component of the radiation (respectively linear and circular). The radiometer
has a beam-width oif 7 or 14 deg, but it can be coupled to a telescope
increasing the resolution. The expected CMB polarization is at most a part per
milion. The polarimeter has been designed to be sensitive to this faint signal,
and it has been optimized to improve its long term stability, observing from
the ground. In this contribution the performances of the instrument are
presented, together with the preliminary test and observations.

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