Astronomy and Astrophysics – Astronomy
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apjs..158...93o&link_type=abstract
The Astrophysical Journal Supplement Series, Volume 158, Issue 1, pp. 93-100.
Astronomy and Astrophysics
Astronomy
10
Cosmology: Cosmic Microwave Background, Cosmology: Observations, Cosmology: Large-Scale Structure Of Universe
Scientific paper
The Background Emission Anisotropy Scanning Telescope (BEAST) is a 2.2 m off-axis telescope with an eight-element mixed Q-band (38-45 GHz) and Ka-band (26-36 GHz) focal plane, designed for balloon-borne and ground-based studies of the cosmic microwave background (CMB). Here we present the CMB angular power spectrum calculated from 682 hr of data observed with the BEAST instrument. We use a binned pseudo-Cl estimator (the MASTER method). We find results that are consistent with other determinations of the CMB anisotropy for angular wavenumbers l between 100 and 600. We also perform cosmological parameter estimation. The BEAST data alone produce a good constraint on Ωk≡1-Ωtot=-0.074+/-0.070, consistent with a flat universe. A joint parameter estimation analysis with a number of previous CMB experiments produces results consistent with previous determinations.
Bersanelli Marco
Childers Jeffrey
Figueiredo Newton
Halevi Doron
Huey Greg
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