BICEP2 III: Instrumental systematics
Abstract
In a companion paper, we have reported a >5σ detection of degree scale B-mode polarization at 150 GHz by the Bicep2 experiment. Here we provide a detailed study of potential instrumental systematic contamination to that measurement. We focus extensively on spurious polarization that can potentially arise from beam imperfections. We present a heuristic classification of beam imperfections according to their symmetries and uniformities, and discuss how resulting contamination adds or cancels in maps that combine observations made at multiple orientations of the telescope about its boresight axis. We introduce a technique, which we call "deprojection," for filtering the leading order beam-induced contamination from time-ordered data, and show that it reduces power in Bicep2's actual and null-test BB spectra consistent with predictions using high signal-to-noise beam shape measurements. We detail the simulation pipeline that we use to directly simulate instrumental systematics and the calibration data used as input to that pipeline. Finally, we present the constraints on BB contamination from individual sources of potential systematics. We find that systematics contribute BB power that is a factor of ~10× below Bicep2's three-year statistical uncertainty, and negligible compared to the observed BB signal. Lastly, the contribution to the best-fit tensor/scalar ratio is atmore »
- Authors:
-
- Cardiff Univ., Cardiff (United Kingdom). et al.
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- Contributing Org.:
- Bicep2 Collaboration
- OSTI Identifier:
- 1263414
- Report Number(s):
- SLAC-PUB-16624
Journal ID: ISSN 1538-4357; arXiv:1502.00608
- 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: 814; 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; instrumentation: polarimeters; methods: data analysis
Citation Formats
Ade, P. A. R. BICEP2 III: Instrumental systematics. United States: N. p., 2015.
Web. doi:10.1088/0004-637X/814/2/110.
Ade, P. A. R. BICEP2 III: Instrumental systematics. United States. https://doi.org/10.1088/0004-637X/814/2/110
Ade, P. A. R. Mon .
"BICEP2 III: Instrumental systematics". United States. https://doi.org/10.1088/0004-637X/814/2/110. https://www.osti.gov/servlets/purl/1263414.
@article{osti_1263414,
title = {BICEP2 III: Instrumental systematics},
author = {Ade, P. A. R.},
abstractNote = {In a companion paper, we have reported a >5σ detection of degree scale B-mode polarization at 150 GHz by the Bicep2 experiment. Here we provide a detailed study of potential instrumental systematic contamination to that measurement. We focus extensively on spurious polarization that can potentially arise from beam imperfections. We present a heuristic classification of beam imperfections according to their symmetries and uniformities, and discuss how resulting contamination adds or cancels in maps that combine observations made at multiple orientations of the telescope about its boresight axis. We introduce a technique, which we call "deprojection," for filtering the leading order beam-induced contamination from time-ordered data, and show that it reduces power in Bicep2's actual and null-test BB spectra consistent with predictions using high signal-to-noise beam shape measurements. We detail the simulation pipeline that we use to directly simulate instrumental systematics and the calibration data used as input to that pipeline. Finally, we present the constraints on BB contamination from individual sources of potential systematics. We find that systematics contribute BB power that is a factor of ~10× below Bicep2's three-year statistical uncertainty, and negligible compared to the observed BB signal. Lastly, the contribution to the best-fit tensor/scalar ratio is at a level equivalent to r = (3–6) × 10–3.},
doi = {10.1088/0004-637X/814/2/110},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 814,
place = {United States},
year = {Mon Nov 23 00:00:00 EST 2015},
month = {Mon Nov 23 00:00:00 EST 2015}
}
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Works referenced in this record:
Constraints on generalized inflationary cosmologies
journal, October 1984
- Abbott, L. F.; Wise, Mark B.
- Nuclear Physics B, Vol. 244, Issue 2
Degree-Scale Cosmic Microwave Background Polarization Measurements from Three Years of Bicep1 data
journal, February 2014
- Barkats, D.; Aikin, R.; Bischoff, C.
- The Astrophysical Journal, Vol. 783, Issue 2
Detection of -Mode Polarization at Degree Angular Scales by BICEP2
journal, June 2014
- Ade, P. A. R.; Aikin, R. W.; Barkats, D.
- Physical Review Letters, Vol. 112, Issue 24
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
bicep2/ KECK ARRAY . IV. OPTICAL CHARACTERIZATION AND PERFORMANCE OF THE bicep2 AND KECK ARRAY EXPERIMENTS
journal, June 2015
- Ade, P. A. R.; Aikin, R. W.; Barkats, D.
- The Astrophysical Journal, Vol. 806, Issue 2
BICEP2/KECK ARRAY V: MEASUREMENTS OF B -MODE POLARIZATION AT DEGREE ANGULAR SCALES AND 150 GHz BY THE KECK ARRAY
journal, September 2015
- Ade, P. A. R.; Ahmed, Z.; Aikin, R. W.
- The Astrophysical Journal, Vol. 811, Issue 2
ANTENNA-COUPLED TES BOLOMETERS USED IN BICEP2, Keck Array , AND SPIDER
journal, October 2015
- Ade, P. A. R.; Aikin, R. W.; Amiri, M.
- The Astrophysical Journal, Vol. 812, Issue 2
A Millimeter-Wave Galactic Plane Survey with the Bicep Polarimeter
journal, October 2011
- Bierman, E. M.; Matsumura, T.; Dowell, C. D.
- The Astrophysical Journal, Vol. 741, Issue 2
The q/u Imaging Experiment Instrument
journal, April 2013
- Bischoff, C.; Brizius, A.; Buder, I.
- The Astrophysical Journal, Vol. 768, Issue 1
Cosmic background radiation anisotropies in universes dominated by nonbaryonic dark matter
journal, October 1984
- Bond, J. R.; Efstathiou, G.
- The Astrophysical Journal, Vol. 285
Measurement of Cosmic Microwave Background Polarization Power Spectra from two Years of Bicep data
journal, February 2010
- Chiang, H. C.; Ade, P. A. R.; Barkats, D.
- The Astrophysical Journal, Vol. 711, Issue 2
The Atacama Cosmology Telescope: temperature and gravitational lensing power spectrum measurements from three seasons of data
journal, April 2014
- Das, Sudeep; Louis, Thibaut; Nolta, Michael R.
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 04
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
The effect of primordially produced gravitons upon the anisotropy of the cosmological microwave background radiation
journal, June 1983
- Fabbri, R.; Pollock, M. D.
- Physics Letters B, Vol. 125, Issue 6
THE ATACAMA COSMOLOGY TELESCOPE: A MEASUREMENT OF THE 600 < ℓ < 8000 COSMIC MICROWAVE BACKGROUND POWER SPECTRUM AT 148 GHz
journal, September 2010
- Fowler, J. W.; Acquaviva, V.; Ade, P. A. R.
- The Astrophysical Journal, Vol. 722, Issue 2
CMB polarization can constrain cosmology better than CMB temperature
journal, September 2014
- Galli, Silvia; Benabed, Karim; Bouchet, François
- Physical Review D, Vol. 90, Issue 6
NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL PARAMETER RESULTS
journal, September 2013
- Hinshaw, G.; Larson, D.; Komatsu, E.
- The Astrophysical Journal Supplement Series, Vol. 208, Issue 2
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
CONSTRAINTS ON COSMOLOGY FROM THE COSMIC MICROWAVE BACKGROUND POWER SPECTRUM OF THE 2500 deg 2 SPT-SZ SURVEY
journal, January 2014
- Hou, Z.; Reichardt, C. L.; Story, K. T.
- The Astrophysical Journal, Vol. 782, Issue 2
Benchmark parameters for CMB polarization experiments
journal, February 2003
- Hu, Wayne; Hedman, Matthew M.; Zaldarriaga, Matias
- Physical Review D, Vol. 67, Issue 4
Time-division SQUID multiplexers
conference, January 2002
- Irwin, K. D.; Vale, L. R.; Bergren, N. E.
- LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors, AIP Conference Proceedings
SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: SKY MAPS, SYSTEMATIC ERRORS, AND BASIC RESULTS
journal, January 2011
- Jarosik, N.; Bennett, C. L.; Dunkley, J.
- The Astrophysical Journal Supplement Series, Vol. 192, Issue 2
A Probe of Primordial Gravity Waves and Vorticity
journal, March 1997
- Kamionkowski, Marc; Kosowsky, Arthur; Stebbins, Albert
- Physical Review Letters, Vol. 78, Issue 11
Self-Calibration of Cosmic Microwave Background Polarization Experiments
journal, December 2012
- Keating, Brian G.; Shimon, Meir; Yadav, Amit P. S.
- The Astrophysical Journal, Vol. 762, Issue 2
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
Detection of polarization in the cosmic microwave background using DASI
journal, December 2002
- Kovac, J. M.; Leitch, E. M.; Pryke, C.
- Nature, Vol. 420, Issue 6917
Antenna-coupled TES bolometer arrays for CMB polarimetry
conference, August 2008
- Kuo, C. L.; Bock, J. J.; Bonetti, J. A.
- SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
Measurements of Secondary Cosmic Microwave Background Anisotropies with the South pole Telescope
journal, July 2010
- Lueker, M.; Reichardt, C. L.; Schaffer, K. K.
- The Astrophysical Journal, Vol. 719, Issue 2
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
Antenna-coupled TES bolometers for the Keck array, Spider, and Polar-1
conference, September 2012
- O'Brient, R.; Ade, P. A. R.; Ahmed, Z.
- SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
Systematic errors in cosmic microwave background polarization measurements
journal, April 2007
- O'Dea, Daniel; Challinor, Anthony; Johnson, Bradley R.
- Monthly Notices of the Royal Astronomical Society, Vol. 376, Issue 4
A Measurement of Excess Antenna Temperature at 4080 Mc/s.
journal, July 1965
- Penzias, A. A.; Wilson, R. W.
- The Astrophysical Journal, Vol. 142
Planck 2013 results. VII. HFI time response and beams
journal, October 2014
- Ade, P. A. R.; Aghanim, N.; Armitage-Caplan, C.
- Astronomy & Astrophysics, Vol. 571
Planck 2013 results. VIII. HFI photometric calibration and mapmaking
journal, October 2014
- Ade, P. A. R.; Aghanim, N.; Armitage-Caplan, C.
- Astronomy & Astrophysics, Vol. 571
Planck 2013 results. XVI. Cosmological parameters
journal, October 2014
- Ade, P. A. R.; Aghanim, N.; Armitage-Caplan, C.
- Astronomy & Astrophysics, Vol. 571
SECOND AND THIRD SEASON QUaD COSMIC MICROWAVE BACKGROUND TEMPERATURE AND POLARIZATION POWER SPECTRA
journal, February 2009
- Pryke, C.; Ade, P.; Bock, J.
- The Astrophysical Journal, Vol. 692, Issue 2
SECOND SEASON QUIET OBSERVATIONS: MEASUREMENTS OF THE COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRUM AT 95 GHz
journal, November 2012
- Araujo, D.; Bischoff, C.; Brizius, A.
- The Astrophysical Journal, Vol. 760, Issue 2
FIRST SEASON QUIET OBSERVATIONS: MEASUREMENTS OF COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRA AT 43 GHz IN THE MULTIPOLE RANGE 25 ⩽ $\ell$ ⩽ 475
journal, October 2011
- Bischoff, C.; Brizius, A.; Buder, I.
- The Astrophysical Journal, Vol. 741, Issue 2
Graviton creation in the inflationary universe and the grand unification scale
journal, September 1982
- Rubakov, V. A.; Sazhin, M. V.; Veryaskin, A. V.
- Physics Letters B, Vol. 115, Issue 3
Measuring Polarization in the Cosmic Microwave Background
journal, June 1997
- Seljak, Uroš
- The Astrophysical Journal, Vol. 482, Issue 1
Signature of Gravity Waves in the Polarization of the Microwave Background
journal, March 1997
- Seljak, Uros̆; Zaldarriaga, Matias
- Physical Review Letters, Vol. 78, Issue 11
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
CMB polarization systematics due to beam asymmetry: Impact on inflationary science
journal, April 2008
- Shimon, Meir; Keating, Brian; Ponthieu, Nicolas
- Physical Review D, Vol. 77, Issue 8
The Atacama Cosmology Telescope: cosmological parameters from three seasons of data
journal, October 2013
- Sievers, Jonathan L.; Hlozek, Renée A.; Nolta, Michael R.
- Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 10
A Measurement of the Cosmic Microwave Background Damping tail from the 2500-Square-Degree Spt-Sz Survey
journal, November 2013
- Story, K. T.; Reichardt, C. L.; Hou, Z.
- The Astrophysical Journal, Vol. 779, Issue 1
Characterization of the Bicep Telescope for High-Precision Cosmic Microwave Background Polarimetry
journal, February 2010
- Takahashi, Y. D.; Ade, P. A. R.; Barkats, D.
- The Astrophysical Journal, Vol. 711, Issue 2
Fast convolution on the sphere
journal, May 2001
- Wandelt, Benjamin D.; Górski, Krzysztof M.
- Physical Review D, Vol. 63, Issue 12
The Robinson Gravitational Wave Background Telescope (BICEP): a bolometric large angular scale CMB polarimeter
conference, June 2006
- Yoon, K. W.; Ade, P. A. R.; Barkats, D.
- SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
CMB Polarization Systematics Due to Beam Asymmetry: Impact on Inflationary Science
text, January 2007
- Shimon, Meir; Keating, Brian; Ponthieu, Nicolas
- arXiv
Measurement of Cosmic Microwave Background Polarization Power Spectra from Two Years of BICEP Data
text, January 2009
- Chiang, H. C.; Ade, P. A. R.; Barkats, D.
- arXiv
Characterization of the BICEP Telescope for High-Precision Cosmic Microwave Background Polarimetry
text, January 2009
- Takahashi, Y. D.; Ade, P. A. R.; Barkats, D.
- arXiv
Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Sky Maps, Systematic Errors, and Basic Results
text, January 2010
- Jarosik, N.; Bennett, C. L.; Dunkley, J.
- arXiv
A Millimeter-Wave Galactic Plane Survey With The BICEP Polarimeter
text, January 2011
- Bierman, E. M.; Matsumura, T.; Dowell, C. D.
- arXiv
Constraints on Cosmology from the Cosmic Microwave Background Power Spectrum of the 2500 ${\rm deg}^2$ SPT-SZ Survey
text, January 2012
- Hou, Z.; Reichardt, C. L.; Story, K. T.
- arXiv
The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data
text, January 2013
- Sievers, Jonathan L.; Hlozek, Renée A.; Nolta, Michael R.
- arXiv
The Atacama Cosmology Telescope: Temperature and Gravitational Lensing Power Spectrum Measurements from Three Seasons of Data
text, January 2013
- Das, Sudeep; Louis, Thibaut; Nolta, Michael R.
- arXiv
Planck 2013 results. VII. HFI time response and beams
text, January 2013
- Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
- arXiv
Planck 2013 results. VIII. HFI photometric calibration and mapmaking
text, January 2013
- Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
- arXiv
Planck 2013 results. XVI. Cosmological parameters
text, January 2013
- Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
- arXiv
Antenna-coupled TES bolometers used in BICEP2, Keck array, and SPIDER
text, January 2015
- Ade, P. A. R.; Aikin, R. W.; Amiri, M.
- arXiv
The Robinson Gravitational Wave Background Telescope (BICEP): a bolometric large angular scale CMB polarimeter
text, January 2006
- Yoon, K. W.; Ade, P. A. R.; Barkats, D.
- arXiv
A Probe of Primordial Gravity Waves and Vorticity
text, January 1996
- Kamionkowski, Marc; Kosowsky, Arthur; Stebbins, Albert
- arXiv
Works referencing / citing this record:
Measuring Reionization, Neutrino Mass, and Cosmic Inflation with BFORE
journal, July 2018
- Bryan, Sean; Ade, Peter; Bond, J. Richard
- Journal of Low Temperature Physics, Vol. 193, Issue 5-6
Microwave SQUID multiplexer demonstration for cosmic microwave background imagers
journal, December 2017
- Dober, B.; Becker, D. T.; Bennett, D. A.
- Applied Physics Letters, Vol. 111, Issue 24
Performance of a continuously rotating half-wave plate on the POLARBEAR telescope
journal, May 2017
- Takakura, Satoru; Aguilar, Mario; Akiba, Yoshiki
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 05
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
Bicep2/ KECK ARRAY VIII: MEASUREMENT OF GRAVITATIONAL LENSING FROM LARGE-SCALE B -MODE POLARIZATION
journal, December 2016
- Ade, P. A. R.; Ahmed, Z.; Aikin, R. W.
- The Astrophysical Journal, Vol. 833, Issue 2
BICEP2/Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Data Set
journal, October 2019
- Ade, P. A. R.; Ahmed, Z.; Aikin, R. W.
- The Astrophysical Journal, Vol. 884, Issue 2
Performance of a continuously rotating half-wave plate on the POLARBEAR telescope
text, January 2017
- Takakura, Satoru; Aguilar, Mario; Akiba, Yoshiki
- arXiv
BICEP2 / Keck Array IX: New Bounds on Anisotropies of CMB Polarization Rotation and Implications for Axion-Like Particles and Primordial Magnetic Fields
text, January 2017
- Array, Keck; Collaborations, Bicep2; Ade, P. A. R.
- arXiv
Measuring Reionization, Neutrino Mass, and Cosmic Inflation with BFORE
text, January 2017
- Bryan, Sean; Ade, Peter; Bond, J. Richard
- arXiv
Microwave SQUID Multiplexer demonstration for Cosmic Microwave Background Imagers
text, January 2017
- Dober, B.; Becker, D. T.; Bennett, D. A.
- arXiv