C. B. Netterfield et al. 1997 ApJ 474 47 doi:10.1086/303438
A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
FREEC. B. Netterfield1,2, M. J. Devlin1, N. Jarosik1, L. Page1 and E. J. Wollack1,3
Show affiliationsWe report on a measurement of the angular power spectrum of the anisotropy in the cosmic microwave background (CMB). The anisotropy is measured in 23 different multipole bands from l = 54 (≈ 3°) to l = 404 (≈ 0
45) and in six frequency bands from 26 to 46 GHz over three observing seasons. The measurements are consistent from year to year. The frequency spectral index of the fluctuations (measured at low l) is consistent with that of the CMB and inconsistent with either dust or Galactic free-free emission. Furthermore, the observations of the MSAM1-92 experiment (Cheng et al. 1994) are repeated and confirmed. The angular spectrum shows a distinct rise from δTl ≡ [l(2l+1)
| aml |2
/4π]1/2=49+ 8−5 μK at l = 87 to δTl=85+ 10−8 μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.
- Subject headings
- Dates
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Issue 1 (1997 January 1)
Received 1996 January 31, accepted for publication 1996 July 22
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A Measurement of the Angular Power Spectrum of the Anisotropy in the Cosmic Microwave Background
C. B. Netterfield et al. 1997 ApJ 474 47
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