New cosmic microwave background power spectrum constraints from MSAM1

G. W. Wilson, L. Knox, S. Dodelson, K. Coble, E. S. Cheng, D. A. Cottingham, D. J. Fixsen, A. B. Goldin, C. A. Inman, M. S. Kowitt, S. S. Meyer, L. A. Page, J. L. Puchalla, J. E. Ruhl, R. F. Silverberg

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


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 deg2 of sky at half-degree resolution in four frequency bands from 5.2 to 20 cm-1 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 l ∼ 400. The analysis technique is described in a companion paper (L. Knox).

Original languageEnglish (US)
Pages (from-to)57-64
Number of pages8
JournalAstrophysical Journal
Issue number1 PART 1
StatePublished - Mar 20 2000

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • Balloons
  • Cosmic microwave background
  • Cosmology: observations
  • Infrared: ISM: continuum


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