Imperial College London

Professor Andrew H Jaffe

Faculty of Natural SciencesDepartment of Physics

Professor of Astrophysics and Cosmology



+44 (0)20 7594 7526a.jaffe Website




Miss Louise Hayward +44 (0)20 7594 7679




1018BBlackett LaboratorySouth Kensington Campus






BibTex format

author = {Collaboration, TPOLARBEAR and Ade, PAR and Aguilar, M and Akiba, Y and Arnold, K and Baccigalupi, C and Barron, D and Beck, D and Bianchini, F and Boettger, D and Borrill, J and Chapman, S and Chinone, Y and Crowley, K and Cukierman, A and Dobbs, M and Ducout, A and Dünner, R and Elleflot, T and Errard, J and Fabbian, G and Feeney, SM and Feng, C and Fujino, T and Galitzki, N and Gilbert, A and Goeckner-Wald, N and Groh, J and Hamada, T and Hall, G and Halverson, NW and Hasegawa, M and Hazumi, M and Hill, C and Howe, L and Inoue, Y and Jaehnig, GC and Jaffe, AH and Jeong, O and Kaneko, D and Katayama, N and Keating, B and Keskitalo, R and Kisner, T and Krachmalnicoff, N and Kusaka, A and Jeune, ML and Lee, AT and Leitch, EM and Leon, D and Linder, E and Lowry, L and Matsuda, F and Matsumura, T and Minami, Y and Montgomery, J and Navaroli, M and Nishino, H and Paar, H and Peloton, J and Pham, ATP and Poletti, D and Puglisi, G and Reichardt, CL and Richards, PL and Ross, C and Segawa, Y },
doi = {1538-4357/aa8e9f},
journal = {The Astrophysical Journal, 848:141, 2017},
title = {A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data},
url = {},

RIS format (EndNote, RefMan)

AB - We report an improved measurement of the cosmic microwave background (CMB)$B$-mode polarization power spectrum with the POLARBEAR experiment at 150 GHz.By adding new data collected during the second season of observations(2013-2014) to re-analyzed data from the first season (2012-2013), we havereduced twofold the band-power uncertainties. The band powers are reported overangular multipoles $500 \leq \ell \leq 2100$, where the dominant $B$-modesignal is expected to be due to the gravitational lensing of $E$-modes. Wereject the null hypothesis of no $B$-mode polarization at a confidence of3.1$\sigma$ including both statistical and systematic uncertainties. We testthe consistency of the measured $B$-modes with the $\Lambda$ Cold Dark Matter($\Lambda$CDM) framework by fitting for a single lensing amplitude parameter$A_L$ relative to the Planck best-fit model prediction. We obtain $A_L = 0.60^{+0.26} _{-0.24} ({\rm stat}) ^{+0.00} _{-0.04}({\rm inst}) \pm 0.14 ({\rmforeground}) \pm 0.04 ({\rm multi})$, where $A_{L}=1$ is the fiducial$\Lambda$CDM value, and the details of the reported uncertainties are explainedlater in the manuscript.
AU - Collaboration,TPOLARBEAR
AU - Ade,PAR
AU - Aguilar,M
AU - Akiba,Y
AU - Arnold,K
AU - Baccigalupi,C
AU - Barron,D
AU - Beck,D
AU - Bianchini,F
AU - Boettger,D
AU - Borrill,J
AU - Chapman,S
AU - Chinone,Y
AU - Crowley,K
AU - Cukierman,A
AU - Dobbs,M
AU - Ducout,A
AU - Dünner,R
AU - Elleflot,T
AU - Errard,J
AU - Fabbian,G
AU - Feeney,SM
AU - Feng,C
AU - Fujino,T
AU - Galitzki,N
AU - Gilbert,A
AU - Goeckner-Wald,N
AU - Groh,J
AU - Hamada,T
AU - Hall,G
AU - Halverson,NW
AU - Hasegawa,M
AU - Hazumi,M
AU - Hill,C
AU - Howe,L
AU - Inoue,Y
AU - Jaehnig,GC
AU - Jaffe,AH
AU - Jeong,O
AU - Kaneko,D
AU - Katayama,N
AU - Keating,B
AU - Keskitalo,R
AU - Kisner,T
AU - Krachmalnicoff,N
AU - Kusaka,A
AU - Jeune,ML
AU - Lee,AT
AU - Leitch,EM
AU - Leon,D
AU - Linder,E
AU - Lowry,L
AU - Matsuda,F
AU - Matsumura,T
AU - Minami,Y
AU - Montgomery,J
AU - Navaroli,M
AU - Nishino,H
AU - Paar,H
AU - Peloton,J
AU - Pham,ATP
AU - Poletti,D
AU - Puglisi,G
AU - Reichardt,CL
AU - Richards,PL
AU - Ross,C
AU - Segawa,Y
AU - Sherwin,BD
AU - Silva-Feaver,M
AU - Siritanasak,P
AU - Stebor,N
AU - Stompor,R
AU - Suzuki,A
AU - Tajima,O
AU - Takakura,S
AU - Takatori,S
AU - Tanabe,D
AU - Teply,GP
AU - Tomaru,T
AU - Tucker,C
AU - Whitehorn,N
AU - Zahn,A
DO - 1538-4357/aa8e9f
TI - A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data
T2 - The Astrophysical Journal, 848:141, 2017
UR -
UR -
ER -