Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

T. St. Germaine; P. A.R. Ade; Z. Ahmed; M. Amiri; D. Barkats; R. Basu Thakur; C. A. Bischoff; J. J. Bock; H. Boenish; E. Bullock; V. Buza; J. R. Cheshire; J. A. Connors; J. Cornelison; M. Crumrine; A. Cukierman; E. Denison; M. Dierickx; L. Duband; M. Eiben; S. Fatigoni; J. P. Filippini; S. Fliescher; N. Goeckner-Wald; D. C. Goldfinger; J. A. Grayson; P. Grimes; G. Hall; M. Halpern; S. A. Harrison; S. Henderson; S. R. Hildebrandt; G. C. Hilton; J. Hubmayr; H. Hui; K. D. Irwin; J. Kang; K. S. Karkare; E. Karpel; S. Kefeli; S. A. Kernasovskiy; J. M. Kovac; C. L. Kuo; K. Lau; E. M. Leitch; K. G. Megerian; L. Minutolo; L. Moncelsi; Y. Nakato; T. Namikawa; H. T. Nguyen; R. Obrient; R. W. Ogburn; S. Palladino; Nathan Precup; T. Prouve; C. Pryke; B. Racine; C. D. Reintsema; S. Richter; A. Schillaci; B. L. Schmitt; Robert Schwarz; C. D. Sheehy; A. Soliman; B. Steinbach; R. Sudiwala; G. P. Teply; K. L. Thompson; J. E. Tolan; C. Tucker; A. D. Turner; C. Umilta; A. G. Vieregg; A. Wandui; A. C. Weber; D. V. Wiebe; J. Willmert; C. L. Wong; W. L.K. Wu; E. Yang; K. W. Yoon; E. Young; C. Yu; L. Zeng; Cheng Zhang; S. Zhang

doi:10.1117/12.2562729

Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

T. St. Germaine, P. A.R. Ade, Z. Ahmed, M. Amiri, D. Barkats, R. Basu Thakur, C. A. Bischoff, J. J. Bock, H. Boenish, E. Bullock, V. Buza, J. R. Cheshire, J. A. Connors, J. Cornelison, M. Crumrine, A. Cukierman, E. Denison, M. Dierickx, L. Duband, M. EibenS. Fatigoni, J. P. Filippini, S. Fliescher, N. Goeckner-Wald, D. C. Goldfinger, J. A. Grayson, P. Grimes, G. Hall, M. Halpern, S. A. Harrison, S. Henderson, S. R. Hildebrandt, G. C. Hilton, J. Hubmayr, H. Hui, K. D. Irwin, J. Kang, K. S. Karkare, E. Karpel, S. Kefeli, S. A. Kernasovskiy, J. M. Kovac, C. L. Kuo, K. Lau, E. M. Leitch, K. G. Megerian, L. Minutolo, L. Moncelsi, Y. Nakato, T. Namikawa, H. T. Nguyen, R. Obrient, R. W. Ogburn, S. Palladino, Nathan Precup, T. Prouve, C. Pryke, B. Racine, C. D. Reintsema, S. Richter, A. Schillaci, B. L. Schmitt, Robert Schwarz, C. D. Sheehy, A. Soliman, B. Steinbach, R. Sudiwala, G. P. Teply, K. L. Thompson, J. E. Tolan, C. Tucker, A. D. Turner, C. Umilta, A. G. Vieregg, A. Wandui, A. C. Weber, D. V. Wiebe, J. Willmert, C. L. Wong, W. L.K. Wu, E. Yang, K. W. Yoon, E. Young, C. Yu, L. Zeng, Cheng Zhang, S. Zhang

Physics and Astronomy (Twin Cities)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The Bicep/Keck Array experiment is a series of small-Aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-To-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-Averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of beam map simulations which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data.

Original language	English (US)
Title of host publication	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X
Editors	Jonas Zmuidzinas, Jian-Rong Gao
Publisher	SPIE
ISBN (Electronic)	9781510636934
DOIs	https://doi.org/10.1117/12.2562729
State	Published - 2020
Event	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020 - Virtual, Online, United States Duration: Dec 14 2020 → Dec 22 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11453
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020
Country/Territory	United States
City	Virtual, Online
Period	12/14/20 → 12/22/20

Bibliographical note

Funding Information:
The BICEP/Keck project (including BICEP2, BICEP3 and BICEP Array) have been made possible through a series of grants from the National Science Foundation including 0742818, 0742592, 1044978, 1110087, 1145172, 1145143, 1145248, 1639040, 1638957, 1638978, 1638970, 1726917, 1313010, 1313062, 1313158, 1313287, 0960243, 1836010, 1056465, & 1255358 and by the Keck Foundation. The development of antenna-coupled detector technology was supported by the JPL Research and Technology Development Fund and NASA Grants 06-ARPA206-0040, 10-SAT10-0017, 12-SAT12-0031, 14-SAT14-0009, 16-SAT16-0002, & 18-SAT18-0017. The development and testing of focal planes were supported by the Gordon and Betty Moore Foundation at Caltech. Readout electronics were supported by a Canada Foundation for Innovation grant to UBC. The computations in this paper were run on the Odyssey cluster supported by the FAS Science Division Research Computing Group at Harvard University. The analysis effort at Stanford and SLAC was partially supported by the Department of Energy, Contract DE-AC02-76SF00515. We thank the staff of the U.S. Antarctic Program and in particular the South Pole Station without whose help this research would not have been possible. Tireless administrative support was provided by Kathy Deniston, Sheri Stoll, Irene Coyle, Donna Hernandez, and Dana Volponi.

Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Keywords

BICEP
Cosmic microwave background
Gravitational waves
Ination
Keck Array
Polarization

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10.1117/12.2562729

Cite this

St. Germaine, T., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, V., Cheshire, J. R., Connors, J. A., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., ... Zhang, S. (2020). Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018. In J. Zmuidzinas, & J-R. Gao (Eds.), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X [114532E] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11453). SPIE. https://doi.org/10.1117/12.2562729

Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018. / St. Germaine, T.; Ade, P. A.R.; Ahmed, Z.; Amiri, M.; Barkats, D.; Basu Thakur, R.; Bischoff, C. A.; Bock, J. J.; Boenish, H.; Bullock, E.; Buza, V.; Cheshire, J. R.; Connors, J. A.; Cornelison, J.; Crumrine, M.; Cukierman, A.; Denison, E.; Dierickx, M.; Duband, L.; Eiben, M.; Fatigoni, S.; Filippini, J. P.; Fliescher, S.; Goeckner-Wald, N.; Goldfinger, D. C.; Grayson, J. A.; Grimes, P.; Hall, G.; Halpern, M.; Harrison, S. A.; Henderson, S.; Hildebrandt, S. R.; Hilton, G. C.; Hubmayr, J.; Hui, H.; Irwin, K. D.; Kang, J.; Karkare, K. S.; Karpel, E.; Kefeli, S.; Kernasovskiy, S. A.; Kovac, J. M.; Kuo, C. L.; Lau, K.; Leitch, E. M.; Megerian, K. G.; Minutolo, L.; Moncelsi, L.; Nakato, Y.; Namikawa, T.; Nguyen, H. T.; Obrient, R.; Ogburn, R. W.; Palladino, S.; Precup, Nathan; Prouve, T.; Pryke, C.; Racine, B.; Reintsema, C. D.; Richter, S.; Schillaci, A.; Schmitt, B. L.; Schwarz, Robert; Sheehy, C. D.; Soliman, A.; Steinbach, B.; Sudiwala, R.; Teply, G. P.; Thompson, K. L.; Tolan, J. E.; Tucker, C.; Turner, A. D.; Umilta, C.; Vieregg, A. G.; Wandui, A.; Weber, A. C.; Wiebe, D. V.; Willmert, J.; Wong, C. L.; Wu, W. L.K.; Yang, E.; Yoon, K. W.; Young, E.; Yu, C.; Zeng, L.; Zhang, Cheng; Zhang, S.

Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. ed. / Jonas Zmuidzinas; Jian-Rong Gao. SPIE, 2020. 114532E (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11453).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

St. Germaine, T, Ade, PAR, Ahmed, Z, Amiri, M, Barkats, D, Basu Thakur, R, Bischoff, CA, Bock, JJ, Boenish, H, Bullock, E, Buza, V, Cheshire, JR, Connors, JA, Cornelison, J, Crumrine, M, Cukierman, A, Denison, E, Dierickx, M, Duband, L, Eiben, M, Fatigoni, S, Filippini, JP, Fliescher, S, Goeckner-Wald, N, Goldfinger, DC, Grayson, JA, Grimes, P, Hall, G, Halpern, M, Harrison, SA, Henderson, S, Hildebrandt, SR, Hilton, GC, Hubmayr, J, Hui, H, Irwin, KD, Kang, J, Karkare, KS, Karpel, E, Kefeli, S, Kernasovskiy, SA, Kovac, JM, Kuo, CL, Lau, K, Leitch, EM, Megerian, KG, Minutolo, L, Moncelsi, L, Nakato, Y, Namikawa, T, Nguyen, HT, Obrient, R, Ogburn, RW, Palladino, S, Precup, N, Prouve, T, Pryke, C, Racine, B, Reintsema, CD, Richter, S, Schillaci, A, Schmitt, BL, Schwarz, R, Sheehy, CD, Soliman, A, Steinbach, B, Sudiwala, R, Teply, GP, Thompson, KL, Tolan, JE, Tucker, C, Turner, AD, Umilta, C, Vieregg, AG, Wandui, A, Weber, AC, Wiebe, DV, Willmert, J, Wong, CL, Wu, WLK, Yang, E, Yoon, KW, Young, E, Yu, C, Zeng, L, Zhang, C & Zhang, S 2020, Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018. in J Zmuidzinas & J-R Gao (eds), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X., 114532E, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11453, SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020, Virtual, Online, United States, 12/14/20. https://doi.org/10.1117/12.2562729

St. Germaine T, Ade PAR, Ahmed Z, Amiri M, Barkats D, Basu Thakur R et al. Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018. In Zmuidzinas J, Gao J-R, editors, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. SPIE. 2020. 114532E. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2562729

St. Germaine, T. ; Ade, P. A.R. ; Ahmed, Z. ; Amiri, M. ; Barkats, D. ; Basu Thakur, R. ; Bischoff, C. A. ; Bock, J. J. ; Boenish, H. ; Bullock, E. ; Buza, V. ; Cheshire, J. R. ; Connors, J. A. ; Cornelison, J. ; Crumrine, M. ; Cukierman, A. ; Denison, E. ; Dierickx, M. ; Duband, L. ; Eiben, M. ; Fatigoni, S. ; Filippini, J. P. ; Fliescher, S. ; Goeckner-Wald, N. ; Goldfinger, D. C. ; Grayson, J. A. ; Grimes, P. ; Hall, G. ; Halpern, M. ; Harrison, S. A. ; Henderson, S. ; Hildebrandt, S. R. ; Hilton, G. C. ; Hubmayr, J. ; Hui, H. ; Irwin, K. D. ; Kang, J. ; Karkare, K. S. ; Karpel, E. ; Kefeli, S. ; Kernasovskiy, S. A. ; Kovac, J. M. ; Kuo, C. L. ; Lau, K. ; Leitch, E. M. ; Megerian, K. G. ; Minutolo, L. ; Moncelsi, L. ; Nakato, Y. ; Namikawa, T. ; Nguyen, H. T. ; Obrient, R. ; Ogburn, R. W. ; Palladino, S. ; Precup, Nathan ; Prouve, T. ; Pryke, C. ; Racine, B. ; Reintsema, C. D. ; Richter, S. ; Schillaci, A. ; Schmitt, B. L. ; Schwarz, Robert ; Sheehy, C. D. ; Soliman, A. ; Steinbach, B. ; Sudiwala, R. ; Teply, G. P. ; Thompson, K. L. ; Tolan, J. E. ; Tucker, C. ; Turner, A. D. ; Umilta, C. ; Vieregg, A. G. ; Wandui, A. ; Weber, A. C. ; Wiebe, D. V. ; Willmert, J. ; Wong, C. L. ; Wu, W. L.K. ; Yang, E. ; Yoon, K. W. ; Young, E. ; Yu, C. ; Zeng, L. ; Zhang, Cheng ; Zhang, S. / Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X. editor / Jonas Zmuidzinas ; Jian-Rong Gao. SPIE, 2020. (Proceedings of SPIE - The International Society for Optical Engineering).

@inproceedings{3a5129f62da74b7bbaf69909339476f3,

title = "Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018",

abstract = "The Bicep/Keck Array experiment is a series of small-Aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-To-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-Averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of beam map simulations which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data. ",

keywords = "BICEP, Cosmic microwave background, Gravitational waves, Ination, Keck Array, Polarization",

author = "{St. Germaine}, T. and Ade, {P. A.R.} and Z. Ahmed and M. Amiri and D. Barkats and {Basu Thakur}, R. and Bischoff, {C. A.} and Bock, {J. J.} and H. Boenish and E. Bullock and V. Buza and Cheshire, {J. R.} and Connors, {J. A.} and J. Cornelison and M. Crumrine and A. Cukierman and E. Denison and M. Dierickx and L. Duband and M. Eiben and S. Fatigoni and Filippini, {J. P.} and S. Fliescher and N. Goeckner-Wald and Goldfinger, {D. C.} and Grayson, {J. A.} and P. Grimes and G. Hall and M. Halpern and Harrison, {S. A.} and S. Henderson and Hildebrandt, {S. R.} and Hilton, {G. C.} and J. Hubmayr and H. Hui and Irwin, {K. D.} and J. Kang and Karkare, {K. S.} and E. Karpel and S. Kefeli and Kernasovskiy, {S. A.} and Kovac, {J. M.} and Kuo, {C. L.} and K. Lau and Leitch, {E. M.} and Megerian, {K. G.} and L. Minutolo and L. Moncelsi and Y. Nakato and T. Namikawa and Nguyen, {H. T.} and R. Obrient and Ogburn, {R. W.} and S. Palladino and Nathan Precup and T. Prouve and C. Pryke and B. Racine and Reintsema, {C. D.} and S. Richter and A. Schillaci and Schmitt, {B. L.} and Robert Schwarz and Sheehy, {C. D.} and A. Soliman and B. Steinbach and R. Sudiwala and Teply, {G. P.} and Thompson, {K. L.} and Tolan, {J. E.} and C. Tucker and Turner, {A. D.} and C. Umilta and Vieregg, {A. G.} and A. Wandui and Weber, {A. C.} and Wiebe, {D. V.} and J. Willmert and Wong, {C. L.} and Wu, {W. L.K.} and E. Yang and Yoon, {K. W.} and E. Young and C. Yu and L. Zeng and Cheng Zhang and S. Zhang",

note = "Funding Information: The BICEP/Keck project (including BICEP2, BICEP3 and BICEP Array) have been made possible through a series of grants from the National Science Foundation including 0742818, 0742592, 1044978, 1110087, 1145172, 1145143, 1145248, 1639040, 1638957, 1638978, 1638970, 1726917, 1313010, 1313062, 1313158, 1313287, 0960243, 1836010, 1056465, & 1255358 and by the Keck Foundation. The development of antenna-coupled detector technology was supported by the JPL Research and Technology Development Fund and NASA Grants 06-ARPA206-0040, 10-SAT10-0017, 12-SAT12-0031, 14-SAT14-0009, 16-SAT16-0002, & 18-SAT18-0017. The development and testing of focal planes were supported by the Gordon and Betty Moore Foundation at Caltech. Readout electronics were supported by a Canada Foundation for Innovation grant to UBC. The computations in this paper were run on the Odyssey cluster supported by the FAS Science Division Research Computing Group at Harvard University. The analysis effort at Stanford and SLAC was partially supported by the Department of Energy, Contract DE-AC02-76SF00515. We thank the staff of the U.S. Antarctic Program and in particular the South Pole Station without whose help this research would not have been possible. Tireless administrative support was provided by Kathy Deniston, Sheri Stoll, Irene Coyle, Donna Hernandez, and Dana Volponi. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020 ; Conference date: 14-12-2020 Through 22-12-2020",

year = "2020",

doi = "10.1117/12.2562729",

language = "English (US)",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Jonas Zmuidzinas and Jian-Rong Gao",

booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X",

address = "United States",

}

TY - GEN

T1 - Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

AU - St. Germaine, T.

AU - Ade, P. A.R.

AU - Ahmed, Z.

AU - Amiri, M.

AU - Barkats, D.

AU - Basu Thakur, R.

AU - Bischoff, C. A.

AU - Bock, J. J.

AU - Boenish, H.

AU - Bullock, E.

AU - Buza, V.

AU - Cheshire, J. R.

AU - Connors, J. A.

AU - Cornelison, J.

AU - Crumrine, M.

AU - Cukierman, A.

AU - Denison, E.

AU - Dierickx, M.

AU - Duband, L.

AU - Eiben, M.

AU - Fatigoni, S.

AU - Filippini, J. P.

AU - Fliescher, S.

AU - Goeckner-Wald, N.

AU - Goldfinger, D. C.

AU - Grayson, J. A.

AU - Grimes, P.

AU - Hall, G.

AU - Halpern, M.

AU - Harrison, S. A.

AU - Henderson, S.

AU - Hildebrandt, S. R.

AU - Hilton, G. C.

AU - Hubmayr, J.

AU - Hui, H.

AU - Irwin, K. D.

AU - Kang, J.

AU - Karkare, K. S.

AU - Karpel, E.

AU - Kefeli, S.

AU - Kernasovskiy, S. A.

AU - Kovac, J. M.

AU - Kuo, C. L.

AU - Lau, K.

AU - Leitch, E. M.

AU - Megerian, K. G.

AU - Minutolo, L.

AU - Moncelsi, L.

AU - Nakato, Y.

AU - Namikawa, T.

AU - Nguyen, H. T.

AU - Obrient, R.

AU - Ogburn, R. W.

AU - Palladino, S.

AU - Precup, Nathan

AU - Prouve, T.

AU - Pryke, C.

AU - Racine, B.

AU - Reintsema, C. D.

AU - Richter, S.

AU - Schillaci, A.

AU - Schmitt, B. L.

AU - Schwarz, Robert

AU - Sheehy, C. D.

AU - Soliman, A.

AU - Steinbach, B.

AU - Sudiwala, R.

AU - Teply, G. P.

AU - Thompson, K. L.

AU - Tolan, J. E.

AU - Tucker, C.

AU - Turner, A. D.

AU - Umilta, C.

AU - Vieregg, A. G.

AU - Wandui, A.

AU - Weber, A. C.

AU - Wiebe, D. V.

AU - Willmert, J.

AU - Wong, C. L.

AU - Wu, W. L.K.

AU - Yang, E.

AU - Yoon, K. W.

AU - Young, E.

AU - Yu, C.

AU - Zeng, L.

AU - Zhang, Cheng

AU - Zhang, S.

N1 - Funding Information: The BICEP/Keck project (including BICEP2, BICEP3 and BICEP Array) have been made possible through a series of grants from the National Science Foundation including 0742818, 0742592, 1044978, 1110087, 1145172, 1145143, 1145248, 1639040, 1638957, 1638978, 1638970, 1726917, 1313010, 1313062, 1313158, 1313287, 0960243, 1836010, 1056465, & 1255358 and by the Keck Foundation. The development of antenna-coupled detector technology was supported by the JPL Research and Technology Development Fund and NASA Grants 06-ARPA206-0040, 10-SAT10-0017, 12-SAT12-0031, 14-SAT14-0009, 16-SAT16-0002, & 18-SAT18-0017. The development and testing of focal planes were supported by the Gordon and Betty Moore Foundation at Caltech. Readout electronics were supported by a Canada Foundation for Innovation grant to UBC. The computations in this paper were run on the Odyssey cluster supported by the FAS Science Division Research Computing Group at Harvard University. The analysis effort at Stanford and SLAC was partially supported by the Department of Energy, Contract DE-AC02-76SF00515. We thank the staff of the U.S. Antarctic Program and in particular the South Pole Station without whose help this research would not have been possible. Tireless administrative support was provided by Kathy Deniston, Sheri Stoll, Irene Coyle, Donna Hernandez, and Dana Volponi. Publisher Copyright: © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

PY - 2020

Y1 - 2020

N2 - The Bicep/Keck Array experiment is a series of small-Aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-To-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-Averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of beam map simulations which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data.

AB - The Bicep/Keck Array experiment is a series of small-Aperture refracting telescopes observing degree-scale Cosmic Microwave Background polarization from the South Pole in search of a primordial B-mode signature. As a pair differencing experiment, an important systematic that must be controlled is the differential beam response between the co-located, orthogonally polarized detectors. We use high-fidelity, in-situ measurements of the beam response to estimate the temperature-To-polarization (T → P) leakage in our latest data including observations from 2016 through 2018. This includes three years of Bicep3 observing at 95 GHz, and multifrequency data from Keck Array. Here we present band-Averaged far-field beam maps, differential beam mismatch, and residual beam power (after filtering out the leading difference modes via deprojection) for these receivers. We show preliminary results of beam map simulations which use these beam maps to observe a simulated temperature (no Q/U) sky to estimate T → P leakage in our real data.

KW - BICEP

KW - Cosmic microwave background

KW - Gravitational waves

KW - Ination

KW - Keck Array

KW - Polarization

UR - http://www.scopus.com/inward/record.url?scp=85100036855&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85100036855&partnerID=8YFLogxK

U2 - 10.1117/12.2562729

DO - 10.1117/12.2562729

M3 - Conference contribution

AN - SCOPUS:85100036855

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X

A2 - Zmuidzinas, Jonas

A2 - Gao, Jian-Rong

PB - SPIE

T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X 2020

Y2 - 14 December 2020 through 22 December 2020

ER -

Analysis of Temperature-To-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

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