New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz

C. Bischoff; L. Hyatt; J. J. McMahon; G. W. Nixon; D. Samtleben; K. M. Smith; K. Vanderlinde; D. Barkats; P. Farese; T. Gaier; J. O. Gundersen; M. M. Hedman; S. T. Staggs; B. Winstein

doi:10.1086/590487

New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz

C. Bischoff, L. Hyatt, J. J. McMahon, G. W. Nixon, D. Samtleben, K. M. Smith, K. Vanderlinde, D. Barkats, P. Farese, T. Gaier, J. O. Gundersen, M. M. Hedman, S. T. Staggs, B. Winstein

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Abstract

We present new measurements of the CMB polarization from the final season of CAPMAP. The data set was obtained in winter 2004-2005 with the 7 m antenna in Crawford Hill, New Jersey, from 12 W-band (84-100 GHz) and four Q-band (36-45 GHz) correlation Polarimeters with 3.3′ and 6.5′ beam sizes, respectively. After selection criteria were applied, 956 (939) hr of data survived for analysis of W-band (Q-band) data. Two independent and complementary pipelines produced results in excellent agreement with each other. A broad suite of null tests, as well as extensive simulations, showed that systematic errors were minimal, and a comparison of the W-band and Q-band sky maps revealed no contamination from galactic foregrounds. We report the E-mode and B-mode power spectra in seven bands in the range 200 ≤ℓ ≤3000, extending the range of previous measurements to higher ℓ The E-mode spectrum, which is detected at 11 σ significance, is in agreement with cosmological predictions and with previous work at other frequencies and angular resolutions. The BB power spectrum provides one of the best limits to date on B-mode power at 4.8 μK² (95% confidence).

Original language	English (US)
Pages (from-to)	771-789
Number of pages	19
Journal	Astrophysical Journal
Volume	684
Issue number	2
DOIs	https://doi.org/10.1086/590487
State	Published - Sep 10 2008

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmic microwave background
Cosmology: observations
Polarization

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10.1086/590487

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Bischoff, C., Hyatt, L., McMahon, J. J., Nixon, G. W., Samtleben, D., Smith, K. M., Vanderlinde, K., Barkats, D., Farese, P., Gaier, T., Gundersen, J. O., Hedman, M. M., Staggs, S. T., & Winstein, B. (2008). New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz. Astrophysical Journal, 684(2), 771-789. https://doi.org/10.1086/590487

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title = "New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz",

abstract = "We present new measurements of the CMB polarization from the final season of CAPMAP. The data set was obtained in winter 2004-2005 with the 7 m antenna in Crawford Hill, New Jersey, from 12 W-band (84-100 GHz) and four Q-band (36-45 GHz) correlation Polarimeters with 3.3′ and 6.5′ beam sizes, respectively. After selection criteria were applied, 956 (939) hr of data survived for analysis of W-band (Q-band) data. Two independent and complementary pipelines produced results in excellent agreement with each other. A broad suite of null tests, as well as extensive simulations, showed that systematic errors were minimal, and a comparison of the W-band and Q-band sky maps revealed no contamination from galactic foregrounds. We report the E-mode and B-mode power spectra in seven bands in the range 200 ≤ℓ ≤3000, extending the range of previous measurements to higher ℓ The E-mode spectrum, which is detected at 11 σ significance, is in agreement with cosmological predictions and with previous work at other frequencies and angular resolutions. The BB power spectrum provides one of the best limits to date on B-mode power at 4.8 μK2 (95% confidence).",

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

author = "C. Bischoff and L. Hyatt and McMahon, {J. J.} and Nixon, {G. W.} and D. Samtleben and Smith, {K. M.} and K. Vanderlinde and D. Barkats and P. Farese and T. Gaier and Gundersen, {J. O.} and Hedman, {M. M.} and Staggs, {S. T.} and B. Winstein",

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T1 - New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz

AU - Bischoff, C.

AU - Hyatt, L.

AU - McMahon, J. J.

AU - Nixon, G. W.

AU - Samtleben, D.

AU - Smith, K. M.

AU - Vanderlinde, K.

AU - Barkats, D.

AU - Farese, P.

AU - Gaier, T.

AU - Gundersen, J. O.

AU - Hedman, M. M.

AU - Staggs, S. T.

AU - Winstein, B.

PY - 2008/9/10

Y1 - 2008/9/10

N2 - We present new measurements of the CMB polarization from the final season of CAPMAP. The data set was obtained in winter 2004-2005 with the 7 m antenna in Crawford Hill, New Jersey, from 12 W-band (84-100 GHz) and four Q-band (36-45 GHz) correlation Polarimeters with 3.3′ and 6.5′ beam sizes, respectively. After selection criteria were applied, 956 (939) hr of data survived for analysis of W-band (Q-band) data. Two independent and complementary pipelines produced results in excellent agreement with each other. A broad suite of null tests, as well as extensive simulations, showed that systematic errors were minimal, and a comparison of the W-band and Q-band sky maps revealed no contamination from galactic foregrounds. We report the E-mode and B-mode power spectra in seven bands in the range 200 ≤ℓ ≤3000, extending the range of previous measurements to higher ℓ The E-mode spectrum, which is detected at 11 σ significance, is in agreement with cosmological predictions and with previous work at other frequencies and angular resolutions. The BB power spectrum provides one of the best limits to date on B-mode power at 4.8 μK2 (95% confidence).

AB - We present new measurements of the CMB polarization from the final season of CAPMAP. The data set was obtained in winter 2004-2005 with the 7 m antenna in Crawford Hill, New Jersey, from 12 W-band (84-100 GHz) and four Q-band (36-45 GHz) correlation Polarimeters with 3.3′ and 6.5′ beam sizes, respectively. After selection criteria were applied, 956 (939) hr of data survived for analysis of W-band (Q-band) data. Two independent and complementary pipelines produced results in excellent agreement with each other. A broad suite of null tests, as well as extensive simulations, showed that systematic errors were minimal, and a comparison of the W-band and Q-band sky maps revealed no contamination from galactic foregrounds. We report the E-mode and B-mode power spectra in seven bands in the range 200 ≤ℓ ≤3000, extending the range of previous measurements to higher ℓ The E-mode spectrum, which is detected at 11 σ significance, is in agreement with cosmological predictions and with previous work at other frequencies and angular resolutions. The BB power spectrum provides one of the best limits to date on B-mode power at 4.8 μK2 (95% confidence).

KW - Cosmic microwave background

KW - Cosmology: observations

KW - Polarization

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New measurements of fine-scale CMB polarization power spectra from CAPMAP at both 40 and 90 GHz

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