دورية أكاديمية
BICEP2 / Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Dataset
| العنوان: | BICEP2 / Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Dataset |
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| المؤلفون: | Ade, P.A.R., Ahmed, Z., Aikin, R.W., Barkats, D., Benton, S.J., Bischoff, C.A., Bock, J.J., Bowens-Rubin, R., Brevik, J.A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B.P., Crumrine, M., Dierickx, M., Duband, L., Filippini, J.P., Fliescher, S., Grayson, J., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S.R., Hilton, G.C., Hui, H., Irwin, K.D., Kang, J., Karkare, K.S., Karpel, E., Kaufman, J.P., Keating, B.G., Kefeli, S., Kernasovskiy, S.A., Kovac, J.M., Kuo, C.L., Larsen, N.A., Lau, K., Leitch, E.M., Lueker, M., Megerian, K.G., Moncelsi, L., Namikawa, T., Netterfield, C.B., Nguyen, H.T., O'Brient, R., Ogburn, R.W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C.D., Soliman, A., Germaine, T.St., Staniszewski, Z.K., Steinbach, B., Sudiwala, R.V., 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, H., Yoon, K.W., Zhang, C. |
| المساهمون: | Service des Basses Températures (SBT ), Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), BICEP2, Keck Array |
| المصدر: | Astrophys.J. ; https://hal.science/hal-02116550Test ; Astrophys.J., 2019, 884, pp.114. ⟨10.3847/1538-4357/ab391d⟩ |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2019 |
| المجموعة: | Université Grenoble Alpes: HAL |
| مصطلحات موضوعية: | beam profile, inflation, scalar tensor, BICEP, B-mode, WMAP, cosmic background radiation: polarization, statistical, Planck, temperature, sensitivity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
| الوصف: | International audience ; Precision measurements of cosmic microwave background (CMB) polarization require extreme control of instrumental systematics. In a companion paper we have presented cosmological constraints from observations with the BICEP2 and Keck Array experiments up to and including the 2015 observing season (BK15), resulting in the deepest CMB polarization maps to date and a statistical sensitivity to the tensor-to-scalar ratio of $\sigma(r) = 0.020$. In this work we characterize the beams and constrain potential systematic contamination from main beam shape mismatch at the three BK15 frequencies (95, 150, and 220 GHz). Far-field maps of 7,360 distinct beam patterns taken from 2010-2015 are used to measure differential beam parameters and predict the contribution of temperature-to-polarization leakage to the BK15 B-mode maps. In the multifrequency, multicomponent likelihood analysis that uses BK15, Planck, and WMAP maps to separate sky components, we find that adding this predicted leakage to simulations induces a bias of $\Delta r = 0.0027 \pm 0.0019$. Future results using higher-quality beam maps and improved techniques to detect such leakage in CMB data will substantially reduce this uncertainty, enabling the levels of systematics control needed for BICEP Array and other experiments that plan to definitively probe large-field inflation. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/arxiv/1904.01640; hal-02116550; https://hal.science/hal-02116550Test; ARXIV: 1904.01640; INSPIRE: 1727987 |
| DOI: | 10.3847/1538-4357/ab391d |
| الإتاحة: | https://doi.org/10.3847/1538-4357/ab391dTest https://hal.science/hal-02116550Test |
| رقم الانضمام: | edsbas.FAB7AB69 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3847/1538-4357/ab391d |
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