A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background

C. B. Netterfield; M. J. Devlin; N. Jarosik; L. Page; E. J. Wollack

doi:10.1086/303438

A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background

C. B. Netterfield, M. J. Devlin, N. Jarosik, L. Page, E. J. Wollack

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Abstract

We 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 δT_l ≡ [l(2l + 1)〈|a₁^m|²〉/4π]^1/2 = 49_-5⁺⁸ μK at l = 87 to δT_l = 85_-8⁺¹⁰ μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.

Original language	English (US)
Pages (from-to)	47-66
Number of pages	20
Journal	Astrophysical Journal
Volume	474
Issue number	1 PART I
DOIs	https://doi.org/10.1086/303438
State	Published - 1997

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmic microwave background
Cosmology: observations

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10.1086/303438

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@article{697ffe66f6ee4e7ea9ea910e25a99f8f,

title = "A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background",

abstract = "We 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)〈|a1m|2〉/4π]1/2 = 49-5+8 μK at l = 87 to δTl = 85-8+10 μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.",

keywords = "Cosmic microwave background, Cosmology: observations",

author = "Netterfield, {C. B.} and Devlin, {M. J.} and N. Jarosik and L. Page and Wollack, {E. J.}",

year = "1997",

doi = "10.1086/303438",

language = "English (US)",

volume = "474",

pages = "47--66",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 PART I",

}

TY - JOUR

T1 - A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background

AU - Netterfield, C. B.

AU - Devlin, M. J.

AU - Jarosik, N.

AU - Page, L.

AU - Wollack, E. J.

PY - 1997

Y1 - 1997

N2 - We 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)〈|a1m|2〉/4π]1/2 = 49-5+8 μK at l = 87 to δTl = 85-8+10 μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.

AB - We 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)〈|a1m|2〉/4π]1/2 = 49-5+8 μK at l = 87 to δTl = 85-8+10 μK at l = 237. These values do not include an overall ±14% (1 σ) calibration uncertainty. The analysis and possible systematic errors are discussed.

KW - Cosmic microwave background

KW - Cosmology: observations

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U2 - 10.1086/303438

DO - 10.1086/303438

M3 - Article

AN - SCOPUS:0346093601

SN - 0004-637X

VL - 474

SP - 47

EP - 66

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART I

ER -

A measurement of the angular power spectrum of the anisotropy in the cosmic microwave background

Abstract

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Keywords

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