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

Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018
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2016年至2018年BICEP3和Keck CMB数据中的温度-偏振泄漏分析

DOI:
10.1117/12.2562729
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发表时间:
2020
期刊:
and Far-Infrared Detectors and Instrumentation for Astronomy X
影响因子:
--
通讯作者:
Bullock, Eric
Bullock, Eric
中科院分区:
--
文献类型:
--
作者:
St Germaine, Tyler;Ade, P.A.R.;Ahmed, Zeeshan;Amiri, Mandana;Barkats, Denis;Basu Thakur, Ritoban;Bischoff, Colin A.;Bock, James J.;Boenish, Hans;Bullock, Eric

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Bicep/Keck阵列实验是一系列小口径折射望远镜,从南极观测度尺度的宇宙微波背景偏振,以寻找原始的B模式特征。作为一个对差分实验,必须控制的一个重要系统是位于同一位置的正交偏振探测器之间的差分光束响应。我们使用光束响应的高保真原位测量来估计我们最新数据中的温度-偏振(T → P)泄漏,包括2016年至2018年的观测。这包括三年的95 GHz Bicep 3观测和来自Keck阵列的多频数据。在这里,我们提出了这些接收器的带平均远场波束图,差分波束失配和剩余波束功率(通过解投影过滤掉领先的差模后)。我们展示了“波束图模拟”的初步结果,它使用这些波束图来观察模拟的温度(没有Q/U)天空,以估计我们真实的数据中的T → P泄漏。
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.
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发表时间: 2016
期刊: The Astrophysical Journal
影响因子: --
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发表时间: 2018
期刊: SPIE
影响因子: --
作者:
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期刊: The Astrophysical Journal
影响因子: --
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发表时间: 2018
期刊: SPIE
影响因子: --
作者:
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通讯作者: Bowens-Rubin, Rachel