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Title: BICEP2 / Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array

Abstract

Here, the Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg2 for an equivalent survey weight of 250,000 μK–2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
Keck Array and BICEP2 Collaborations
OSTI Identifier:
1270627
Report Number(s):
SLAC-PUB-16658
Journal ID: ISSN 1538-4357; arXiv:1502.00643
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 811; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; astrophysics; ASTRO; cosmic background radiation; cosmology: observations; gravitational waves; inflation; polarization

Citation Formats

Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Crill, B. P., Dowell, C. D., Dvorkin, C., Duband, L., Filippini, J. P., Fliescher, S., Golwala, S. R., Halpern, M., Harrison, S., Hasselfield, M., Hildebrandt, S. R., Hilton, G. C., Hristov, V. V., Hui, H., Irwin, K. D., Karkare, K. S., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Leitch, E. M., Lueker, M., Mason, P., Megerian, K. G., Netterfield, C. B., Nguyen, H. T., O’Brient, R., Ogburn IV, R. W., Orlando, A., Pryke, C., Reintsema, C. D., Richter, S., Schwarz, R., Sheehy, C. D., Staniszewski, Z. K., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Turner, A. D., Vieregg, A. G., Weber, A. C., Willmert, J., Wong, C. L., and Yoon, K. W. BICEP2 / Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array. United States: N. p., 2015. Web. doi:10.1088/0004-637X/811/2/126.
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Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Crill, B. P., Dowell, C. D., Dvorkin, C., Duband, L., Filippini, J. P., Fliescher, S., Golwala, S. R., Halpern, M., Harrison, S., Hasselfield, M., Hildebrandt, S. R., Hilton, G. C., Hristov, V. V., Hui, H., Irwin, K. D., Karkare, K. S., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Leitch, E. M., Lueker, M., Mason, P., Megerian, K. G., Netterfield, C. B., Nguyen, H. T., O’Brient, R., Ogburn IV, R. W., Orlando, A., Pryke, C., Reintsema, C. D., Richter, S., Schwarz, R., Sheehy, C. D., Staniszewski, Z. K., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Turner, A. D., Vieregg, A. G., Weber, A. C., Willmert, J., Wong, C. L., & Yoon, K. W. BICEP2 / Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array. United States. https://doi.org/10.1088/0004-637X/811/2/126
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Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Crill, B. P., Dowell, C. D., Dvorkin, C., Duband, L., Filippini, J. P., Fliescher, S., Golwala, S. R., Halpern, M., Harrison, S., Hasselfield, M., Hildebrandt, S. R., Hilton, G. C., Hristov, V. V., Hui, H., Irwin, K. D., Karkare, K. S., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Leitch, E. M., Lueker, M., Mason, P., Megerian, K. G., Netterfield, C. B., Nguyen, H. T., O’Brient, R., Ogburn IV, R. W., Orlando, A., Pryke, C., Reintsema, C. D., Richter, S., Schwarz, R., Sheehy, C. D., Staniszewski, Z. K., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Turner, A. D., Vieregg, A. G., Weber, A. C., Willmert, J., Wong, C. L., and Yoon, K. W. Tue . "BICEP2 / Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array". United States. https://doi.org/10.1088/0004-637X/811/2/126. https://www.osti.gov/servlets/purl/1270627.
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@article{osti_1270627,
title = {BICEP2 / Keck Array V: Measurements of B-mode polarization at degree angular scales and 150 GHz by the Keck Array},
author = {Ade, P. A. R. and Ahmed, Z. and Aikin, R. W. and Alexander, K. D. and Barkats, D. and Benton, S. J. and Bischoff, C. A. and Bock, J. J. and Brevik, J. A. and Buder, I. and Bullock, E. and Buza, V. and Connors, J. and Crill, B. P. and Dowell, C. D. and Dvorkin, C. and Duband, L. and Filippini, J. P. and Fliescher, S. and Golwala, S. R. and Halpern, M. and Harrison, S. and Hasselfield, M. and Hildebrandt, S. R. and Hilton, G. C. and Hristov, V. V. and Hui, H. and Irwin, K. D. and Karkare, K. S. and Kaufman, J. P. and Keating, B. G. and Kefeli, S. and Kernasovskiy, S. A. and Kovac, J. M. and Kuo, C. L. and Leitch, E. M. and Lueker, M. and Mason, P. and Megerian, K. G. and Netterfield, C. B. and Nguyen, H. T. and O’Brient, R. and Ogburn IV, R. W. and Orlando, A. and Pryke, C. and Reintsema, C. D. and Richter, S. and Schwarz, R. and Sheehy, C. D. and Staniszewski, Z. K. and Sudiwala, R. V. and Teply, G. P. and Thompson, K. L. and Tolan, J. E. and Turner, A. D. and Vieregg, A. G. and Weber, A. C. and Willmert, J. and Wong, C. L. and Yoon, K. W.},
abstractNote = {Here, the Keck Array is a system of cosmic microwave background polarimeters, each similar to the Bicep2 experiment. In this paper we report results from the 2012 to 2013 observing seasons, during which the Keck Array consisted of five receivers all operating in the same (150 GHz) frequency band and observing field as Bicep2. We again find an excess of B-mode power over the lensed-ΛCDM expectation of >5σ in the range 30 < ℓ < 150 and confirm that this is not due to systematics using jackknife tests and simulations based on detailed calibration measurements. In map difference and spectral difference tests these new data are shown to be consistent with Bicep2. Finally, we combine the maps from the two experiments to produce final Q and U maps which have a depth of 57 nK deg (3.4 μK arcmin) over an effective area of 400 deg2 for an equivalent survey weight of 250,000 μK–2. The final BB band powers have noise uncertainty a factor of 2.3 times better than the previous results, and a significance of detection of excess power of >6σ.},
doi = {10.1088/0004-637X/811/2/126},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 811,
place = {United States},
year = {Tue Sep 29 00:00:00 EDT 2015},
month = {Tue Sep 29 00:00:00 EDT 2015}
}
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Works referenced in this record:

A review of metal mesh filters
conference, June 2006

  • Ade, Peter A. R.; Pisano, Giampaolo; Tucker, Carole
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.673162

bicep2/ KECK ARRAY . IV. OPTICAL CHARACTERIZATION AND PERFORMANCE OF THE bicep2 AND KECK ARRAY EXPERIMENTS
journal, June 2015

Optical performance of the BICEP2 Telescope at the South Pole
conference, July 2010

  • Aikin, Randol W.; Ade, P. A.; Benton, S.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.857868

First Measurements of the Polarization of the Cosmic Microwave Background Radiation at Small Angular Scales from CAPMAP
journal, January 2005

  • Barkats, D.; Bischoff, C.; Farese, P.
  • The Astrophysical Journal, Vol. 619, Issue 2
  • DOI: 10.1086/428285

Functional Description of Read-out Electronics for Time-Domain Multiplexed Bolometers for Millimeter and Sub-millimeter Astronomy
journal, January 2008

  • Battistelli, E. S.; Amiri, M.; Burger, B.
  • Journal of Low Temperature Physics, Vol. 151, Issue 3-4
  • DOI: 10.1007/s10909-008-9772-z

NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: FINAL MAPS AND RESULTS
journal, September 2013

  • Bennett, C. L.; Larson, D.; Weiland, J. L.
  • The Astrophysical Journal Supplement Series, Vol. 208, Issue 2
  • DOI: 10.1088/0067-0049/208/2/20

BLASTbus electronics: general-purpose readout and control for balloon-borne experiments
conference, July 2014

  • Benton, S. J.; Ade, P. A.; Amiri, M.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2056693

Degree-Scale Cosmic Microwave Background Polarization Measurements from Three Years of Bicep1 data
journal, February 2014

Detection of B -Mode Polarization at Degree Angular Scales by BICEP2
journal, June 2014

BICEP2. II. Experiment And Three-Year Data Set
journal, August 2014

  • Ade, P. A. R.; Aikin, R. W.; Amiri, M.
  • The Astrophysical Journal, Vol. 792, Issue 1, Article No. 62
  • DOI: 10.1088/0004-637X/792/1/62

New Measurements of Fine‐Scale CMB Polarization Power Spectra from CAPMAP at Both 40 and 90 GHz
journal, September 2008

  • Bischoff, C.; Hyatt, L.; McMahon, J. J.
  • The Astrophysical Journal, Vol. 684, Issue 2
  • DOI: 10.1086/590487

IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD
journal, October 2009

Inflationary Tensor Perturbations after BICEP2
journal, May 2014

Measurement of Cosmic Microwave Background Polarization Power Spectra from two Years of Bicep data
journal, February 2010

Measurements of E-Mode Polarization and Temperature-E-Mode Correlation in the Cosmic Microwave Background from 100 Square Degrees of Sptpol data
journal, May 2015

Time-division superconducting quantum interference device multiplexer for transition-edge sensors
journal, August 2003

  • de Korte, Piet A. J.; Beyer, Joern; Deiker, Steve
  • Review of Scientific Instruments, Vol. 74, Issue 8
  • DOI: 10.1063/1.1593809

How Much Can We Learn about the Physics of Inflation?
journal, May 2014

Sorption coolers development at CEA-SBT
journal, August 1999

Toward an understanding of foreground emission in the BICEP2 region
journal, August 2014

  • Flauger, Raphael; Hill, J. Colin; Spergel, David N.
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 08
  • DOI: 10.1088/1475-7516/2014/08/039

SPATIAL VARIATIONS IN THE SPECTRAL INDEX OF POLARIZED SYNCHROTRON EMISSION IN THE 9 yr WMAP SKY MAPS
journal, July 2014

CMB polarization can constrain cosmology better than CMB temperature
journal, September 2014

HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere
journal, April 2005

  • Gorski, K. M.; Hivon, E.; Banday, A. J.
  • The Astrophysical Journal, Vol. 622, Issue 2
  • DOI: 10.1086/427976

Detection of B -Mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope
journal, September 2013

QUaD: A HIGH-RESOLUTION COSMIC MICROWAVE BACKGROUND POLARIMETER
journal, February 2009

MASTER of the Cosmic Microwave Background Anisotropy Power Spectrum: A Fast Method for Statistical Analysis of Large and Complex Cosmic Microwave Background Data Sets
journal, March 2002

  • Hivon, Eric; Gorski, Krzysztof M.; Netterfield, C. Barth
  • The Astrophysical Journal, Vol. 567, Issue 1
  • DOI: 10.1086/338126

A Probe of Primordial Gravity Waves and Vorticity
journal, March 1997

Keck array and BICEP3: spectral characterization of 5000+ detectors
conference, August 2014

  • Karkare, K. S.; Ade, P. A. R.; Ahmed, Z.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.2056779

Optimization and sensitivity of the Keck array
conference, September 2012

  • Kernasovskiy, S.; Ade, P. A. R.; Aikin, R. W.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.926934

Detection of polarization in the cosmic microwave background using DASI
journal, December 2002

Measurement of polarization with the Degree Angular Scale Interferometer
journal, December 2002

A Measurement of the CMB 〈EE〉 Spectrum from the 2003 Flight of BOOMERANG
journal, August 2006

  • Montroy, T. E.; Ade, P. A. R.; Bock, J. J.
  • The Astrophysical Journal, Vol. 647, Issue 2
  • DOI: 10.1086/505560

A joint analysis of Planck and BICEP2 B modes including dust polarization uncertainty
journal, October 2014

The Atacama Cosmology Telescope: CMB polarization at 200 < ℓ < 9000
journal, October 2014

  • Naess, Sigurd; Hasselfield, Matthew; McMahon, Jeff
  • Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 10
  • DOI: 10.1088/1475-7516/2014/10/007

Three‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Polarization Analysis
journal, June 2007

  • Page, L.; Hinshaw, G.; Komatsu, E.
  • The Astrophysical Journal Supplement Series, Vol. 170, Issue 2
  • DOI: 10.1086/513699

Planck 2013 results. I. Overview of products and scientific results
journal, October 2014

A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND B -MODE POLARIZATION POWER SPECTRUM AT SUB-DEGREE SCALES WITH POLARBEAR
journal, October 2014

  • P. A. R. Ade, The Polarbear Collaboration:; Akiba, Y.; Anthony, A. E.
  • The Astrophysical Journal, Vol. 794, Issue 2
  • DOI: 10.1088/0004-637X/794/2/171

Evidence for Gravitational Lensing of the Cosmic Microwave Background Polarization from Cross-Correlation with the Cosmic Infrared Background
journal, April 2014

Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR Experiment
journal, July 2014

SECOND AND THIRD SEASON QUaD COSMIC MICROWAVE BACKGROUND TEMPERATURE AND POLARIZATION POWER SPECTRA
journal, February 2009

SECOND SEASON QUIET OBSERVATIONS: MEASUREMENTS OF THE COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRUM AT 95 GHz
journal, November 2012

Polarization Observations with the Cosmic Background Imager
journal, October 2004

Measuring α in the early Universe: cosmic microwave background polarization, re-ionization and the Fisher matrix analysis
journal, July 2004

Measuring Polarization in the Cosmic Microwave Background
journal, June 1997

  • Seljak, Uroš
  • The Astrophysical Journal, Vol. 482, Issue 1
  • DOI: 10.1086/304123

Signature of Gravity Waves in the Polarization of the Microwave Background
journal, March 1997

The Keck Array: a pulse tube cooled CMB polarimeter
conference, July 2010

  • Sheehy, C. D.; Ade, P. A. R.; Aikin, R. W.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.857871

Implications of the Cosmic Background Imager Polarization Data
journal, May 2007

  • Sievers, J. L.; Achermann, C.; Bond, J. R.
  • The Astrophysical Journal, Vol. 660, Issue 2
  • DOI: 10.1086/510504

Time-Division SQUID Multiplexers With Reduced Sensitivity to External Magnetic Fields
journal, June 2011

  • Stiehl, G. M.; Cho, H. M.; Hilton, G. C.
  • IEEE Transactions on Applied Superconductivity, Vol. 21, Issue 3
  • DOI: 10.1109/TASC.2010.2091483

South Pole Telescope software systems: control, monitoring, and data acquisition
conference, September 2012

  • Story, K.; Leitch, E.; Ade, P.
  • SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
  • DOI: 10.1117/12.925808

Characterization of the Bicep Telescope for High-Precision Cosmic Microwave Background Polarimetry
journal, February 2010

MAXIPOL: Data Analysis and Results
journal, August 2007

  • Wu, J. H. P.; Zuntz, J.; Abroe, M. E.
  • The Astrophysical Journal, Vol. 665, Issue 1
  • DOI: 10.1086/518112

Gravitational lensing effect on cosmic microwave background polarization
journal, June 1998

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    Works referencing / citing this record:

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    Low-Temperature Detectors for CMB Imaging Arrays
    journal, August 2018

    • Hubmayr, J.; Austermann, J. E.; Beall, J. A.
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    • DOI: 10.1007/s10909-018-2029-6

    Systematic effects from an ambient-temperature, continuously rotating half-wave plate
    journal, September 2016

    • Essinger-Hileman, T.; Kusaka, A.; Appel, J. W.
    • Review of Scientific Instruments, Vol. 87, Issue 9
    • DOI: 10.1063/1.4962023

    Pulsar timing arrays: the promise of gravitational wave detection
    journal, November 2015

    The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
    journal, May 2019

    • Kinney, William H.; Vagnozzi, Sunny; Visinelli, Luca
    • Classical and Quantum Gravity, Vol. 36, Issue 11
    • DOI: 10.1088/1361-6382/ab1d87

    The present and future of the most favoured inflationary models after Planck 2015
    journal, February 2016

    • Escudero, Miguel; Ramírez, Héctor; Boubekeur, Lotfi
    • Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 02
    • DOI: 10.1088/1475-7516/2016/02/020

    CMB lensing tomography with the DES Science Verification galaxies
    journal, January 2016

    • Giannantonio, T.; Fosalba, P.; Cawthon, R.
    • Monthly Notices of the Royal Astronomical Society, Vol. 456, Issue 3
    • DOI: 10.1093/mnras/stv2678

    Full-sky beam convolution for cosmic microwave background applications
    journal, May 2019

    • Duivenvoorden, Adriaan J.; Gudmundsson, Jon E.; Rahlin, Alexandra S.
    • Monthly Notices of the Royal Astronomical Society, Vol. 486, Issue 4
    • DOI: 10.1093/mnras/stz1143

    General relativistic corrections to N -body simulations and the Zel’dovich approximation
    journal, December 2015

    Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz
    conference, July 2018

    • Soliman, Ahmed; Benton, Steve J.; Bischoff, Colin A.
    • Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
    • DOI: 10.1117/12.2312942

    Graviton propagation within the context of the D-material universe
    journal, July 2017

    Flavor versus mass eigenstates in neutrino asymmetries: implications for cosmology
    journal, September 2017

    Small field models with gravitational wave signature supported by CMB data
    journal, May 2018

    Bicep2/ KECK ARRAY VIII: MEASUREMENT OF GRAVITATIONAL LENSING FROM LARGE-SCALE B -MODE POLARIZATION
    journal, December 2016

    A Measurement of the Cosmic Microwave Background B -mode Polarization Power Spectrum at Subdegree Scales from Two Years of polarbear Data
    journal, October 2017

    Measurements of the Temperature and E-mode Polarization of the CMB from 500 Square Degrees of SPTpol Data
    journal, January 2018

    • Henning, J. W.; Sayre, J. T.; Reichardt, C. L.
    • The Astrophysical Journal, Vol. 852, Issue 2
    • DOI: 10.3847/1538-4357/aa9ff4

    CMB lensing tomography with the DES Science Verification galaxies
    text, January 2015

    The present and future of the most favoured inflationary models after $Planck$ 2015
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