Uncertainty of the Cosmic Background Explorer quadrupole detection

Details Uncertainty of the Cosmic Background Explorer quadrupole detection Uncertainty of the Cosmic Background Explorer quadrupole detection

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408l..73s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 408, no. 2, p. L73-L76.

Astronomy and Astrophysics

Astrophysics

10

Background Radiation, Cosmic Background Explorer Satellite, Cosmic Rays, Microwaves, Quadrupoles, Least Squares Method, Power Spectra, Signal To Noise Ratios

Scientific paper

COBE least-squares estimates of the rms quadrupole assume that higher degree multipoles vanish identically. This assumption makes the least-squares quadrupole estimate larger and its uncertainty smaller than they would be if the higher-degree multipoles were treated as unknowns. It is shown here that aliasing from plausible structure in degrees l = 3-20 can account for the COBE quadrupole estimate using 53 GHz data from Galactic latitudes greater than 20 deg and can account for much of the estimate using 'combination ' data from latitudes greater than 10 deg.

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