New CMB Power Spectrum Constraints from MSAMI

Details New CMB Power Spectrum Constraints from MSAMI New CMB Power Spectrum Constraints from MSAMI

1999-02-03

arxiv.org/abs/astro-ph/9902047v1

Astrophys.J. 532 (2000) 57-64

Astronomy and Astrophysics

Astrophysics

9 pages, 6 included figures

Scientific paper

10.1086/308535

We present new cosmic microwave background (CMB) anisotropy results from the combined analysis of the three flights of the first Medium Scale Anisotropy Measurement (MSAM1). This balloon-borne bolometric instrument measured about 10 square degrees of sky at half-degree resolution in 4 frequency bands from 5.2 icm to 20 icm with a high signal-to-noise ratio. Here we present an overview of our analysis methods, compare the results from the three flights, derive new constraints on the CMB power spectrum from the combined data and reduce the data to total-power Wiener-filtered maps of the CMB. A key feature of this new analysis is a determination of the amplitude of CMB fluctuations at $\ell \sim 400$. The analysis technique is described in a companion paper by Knox.

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