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Title: Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm

Abstract

A balloon-borne differential radiometer has measured the large-scale anisotropy of the cosmic background radiation (CBR) with high sensitivity. The antenna temperature dipole anistropy at 90 GHz (3 mm wavelength) is 2.82 +- 0.19 mK, corresponding to a thermodynamic anistropy of 3.48 +- mK for a 2.7 K blackbody CBR. The dipole direction, 11.3 +- 0.1 hours right ascension and -5.7/sup 0/ +- 1.8/sup 0/ declination, agrees well with measurements at other frequencies. Calibration error dominates magnitude uncertainty, with statistical errors on dipole terms being under 0.1 mK. No significant quadrupole power is found, placing a 90% confidence-level upper limit of 0.27 mK on the RMS thermodynamic quadrupolar anistropy. 22 figures, 17 tables.

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
5268291
Report Number(s):
LBL-17118
ON: DE84006774
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Technical Report
Resource Relation:
Other Information: Thesis
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BACKGROUND RADIATION; ANISOTROPY; COSMIC RADIATION; MICROWAVE RADIATION; BALLOONS; COSMOLOGY; EXPERIMENTAL DATA; MEASURING METHODS; AIRSHIPS; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; IONIZING RADIATIONS; NUMERICAL DATA; RADIATIONS; 640106* - Astrophysics & Cosmology- Cosmology

Citation Formats

Epstein, G L. Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm. United States: N. p., 1983. Web. doi:10.2172/5268291.
Epstein, G L. Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm. United States. https://doi.org/10.2172/5268291
Epstein, G L. 1983. "Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm". United States. https://doi.org/10.2172/5268291. https://www.osti.gov/servlets/purl/5268291.
@article{osti_5268291,
title = {Measurement of the large-scale anisotropy of the cosmic background radiation at 3mm},
author = {Epstein, G L},
abstractNote = {A balloon-borne differential radiometer has measured the large-scale anisotropy of the cosmic background radiation (CBR) with high sensitivity. The antenna temperature dipole anistropy at 90 GHz (3 mm wavelength) is 2.82 +- 0.19 mK, corresponding to a thermodynamic anistropy of 3.48 +- mK for a 2.7 K blackbody CBR. The dipole direction, 11.3 +- 0.1 hours right ascension and -5.7/sup 0/ +- 1.8/sup 0/ declination, agrees well with measurements at other frequencies. Calibration error dominates magnitude uncertainty, with statistical errors on dipole terms being under 0.1 mK. No significant quadrupole power is found, placing a 90% confidence-level upper limit of 0.27 mK on the RMS thermodynamic quadrupolar anistropy. 22 figures, 17 tables.},
doi = {10.2172/5268291},
url = {https://www.osti.gov/biblio/5268291}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 1983},
month = {Thu Dec 01 00:00:00 EST 1983}
}