OBSERVATIONS OF THE MICROWAVE BACKGROUND ON A SCALE OF 8-DEGREES .1. THE OBSERVING SYSTEM

被引：17

作者：

DAVIES, RD

WATSON, RA

DAINTREE, EJ

HOPKINS, J

LASENBY, AN

SANCHEZALMEIDA, J

BECKMAN, JE

REBOLO, R

机构：

[1] MULLARD RADIO ASTRON OBSERV,CAVENDISH LAB,CAMBRIDGE CB3 0HE,ENGLAND

[2] INST ASTROFIS CANARIAS,E-38071 LA LAGUNA,SPAIN

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1992年 / 258卷 / 03期

关键词：

ATMOSPHERIC EFFECTS; METHODS OBSERVATIONAL; COSMIC MICROWAVE BACKGROUND;

D O I：

10.1093/mnras/258.3.605

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sensitive observing system for observing the cosmic microwave background on an angular scale of 8-degrees is described. This angular scale is appropriate for studies of intrinsic fluctuations in the CMB generated by gravitational potential fluctuations (the Sachs-Wolfe effect). The beam-switching system employs low-noise and broad-band cryogenically cooled receivers. A major improvement in the stability of the system has resulted from triple-beam operation which removes the effects of atmospheric water vapour and ambient temperature changes to a level of several millikelvin on a single scan. The evaluation and assessment of this system operating at an elevation of 2400 m on Tenerife is described. Results for an RA circle at Dec. = 40-degrees are shown; these reach a sensitivity of better than 100 muK in an 8.4-degrees beam.

引用

页码：605 / 615

页数：11

共 30 条

[1]

BANDAY AJ, 1990, MON NOT R ASTRON SOC, V245, P182

[2] THE STATISTICS OF COSMIC BACKGROUND-RADIATION FLUCTUATIONS [J].