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Diagnosing timing error in WMAP data
Liu H(刘浩); Xiong SL(熊少林); Li TB(李惕碚); Liu, H; Xiong, SL; Li, TP
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2011
卷号413期号:1页码:L96-L100
关键词methods: data analysis cosmic background radiation cosmology: observations
学科分类Astronomy & Astrophysics
DOI10.1111/j.1745-3933.2011.01041.x
通讯作者[Liu, Hao ; Xiong, Shao-Lin ; Li, Ti-Pei] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China ; [Li, Ti-Pei] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China ; [Li, Ti-Pei] Tsinghua Univ, Ctr Astrophys, Beijing 100084, Peoples R China ; [Li, Ti-Pei] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
文章类型Article
英文摘要The Doppler dipole signal dominates the cosmic microwave background (CMB) anisotropy maps obtained by the Wilkinson Microwave Anisotropy Probe (WMAP) mission, and plays a key role throughout the data processing. Previously, we discovered a timing asynchronism of -25.6 ms between the timestamps of the spacecraft attitude and radiometer output in the original raw WMAP time-ordered data (TOD), which, if not corrected during data processing, would generate an artificial quadrupole component (l = 2) in recovered CMB maps (Liu, Xiong & Li 2010). Recently, Roukema (2010b) proves that there does exist a timing offset-induced error corresponding to about -25.6 ms in the WMAP calibrated TOD, by studying the fluctuation variance per pixel in the temperature map recovered from the TOD as a function of assumed timing offset. Here, we find evidence directly in the WMAP TOD for such an uncorrected timing error, which possibly occurred in calculating the Doppler dipole signal during the WMAP team's TOD data processing. The amplitude is highly significant and is consistent with previous work. We also show that the uncorrected timing offset can lead the WMAP CMB quadrupole to be substantially overestimated.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000291558100021
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240311
专题院士_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
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Liu H,Xiong SL,Li TB,et al. Diagnosing timing error in WMAP data[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2011,413(1):L96-L100.
APA 刘浩,熊少林,李惕碚,Liu, H,Xiong, SL,&Li, TP.(2011).Diagnosing timing error in WMAP data.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,413(1),L96-L100.
MLA 刘浩,et al."Diagnosing timing error in WMAP data".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 413.1(2011):L96-L100.
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