We describe polarization observations of the CMBR with the Cosmic Background Imager, a 13 element interferometer which operates in the 26-36 GHz band from Liano de Chajnantour in northern Chile. The array consists of 90-cm Cassegrain antennas mounted on a steerable platform which can be rotated about the optical axis to facilitate polarization observations. The CBI employs single mode circularly polarized receivers which sample multipoles from l～400 to l～4250. The instrumental polarization of the CBI was calibrated with 3C279, a bright polarized point source which was monitored with the VLA.
展开▼
机译：我们描述了与宇宙背景成像仪的CMBR的极化观察，这是一个13个元素干涉仪，它在智利北部的Liano de Chajnantour的26-36 Ghz乐队中运行。该阵列由安装在可转向平台上的90-cm CasseGrain天线组成，该天线可以围绕光轴旋转，以便于偏振观察。 CBI采用单模圆偏振接收器，其从L〜400到L〜4250采样多个子石。用3C279校准CBI的仪器偏振，用VLA监测亮偏振点源。
展开▼
