A unified calibration framework for 21 cm cosmology
A unified calibration framework for 21 cm cosmology
复制标题
21厘米宇宙学统一校准框架
DOI：
10.1093/mnras/stab647
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发表时间：
2021
影响因子：
4.8
通讯作者：
Wilensky, Michael
中科院分区：
文献类型：
--
作者：
Byrne, Ruby;Morales, Miguel F;Hazelton, Bryna J;Wilensky, Michael
定标精度是目前21 cm宇宙学实验中的一个限制系统。虽然有无数的校准方法，但大多数可以归类为“基于天空的”，依赖于天文前景发射的极其精确的模型，或“冗余”，需要具有几乎相同的天线响应模式的精确规则阵列。这两类校准对于干涉测量的实际情况都是不灵活的。实际上，前景模型中的误差、天线位置偏移和波束响应不均匀性会降低校准性能并污染宇宙学信号。在这里，我们表明，天空为基础的和冗余的校准可以统一到一个高度通用的和物理动机的校准框架的基础上贝叶斯统计形式主义。我们的新框架包括基于天空和冗余校准作为特殊情况，但可以额外支持放松这些方法中隐含的刚性假设。我们提出的模拟结果表明，在一个简单的情况下，在天空为基础的和冗余的校准之间的中间制度，提高校准性能。我们的框架是高度通用的，包括新的校准方法，包括技术校准紧凑的非冗余阵列，校准不完整的天空模型，并限制整个频率的校准解决方案。
Calibration precision is currently a limiting systematic in 21 cm cosmology experiments. While there are innumerable calibration approaches, most can be categorized as either ‘sky-based,’ relying on an extremely accurate model of astronomical foreground emission, or ‘redundant,’ requiring a precisely regular array with near-identical antenna response patterns. Both of these classes of calibration are inflexible to the realities of interferometric measurement. In practice, errors in the foreground model, antenna position offsets, and beam response inhomogeneities degrade calibration performance and contaminate the cosmological signal. Here, we show that sky-based and redundant calibration can be unified into a highly general and physically motivated calibration framework based on a Bayesian statistical formalism. Our new framework includes sky-based and redundant calibration as special cases but can additionally support relaxing the rigid assumptions implicit in those approaches. We present simulation results demonstrating that, in a simple case, working in an intermediate regime between sky-based and redundant calibration improves calibration performance. Our framework is highly general and encompasses novel calibration approaches including techniques for calibrating compact non-redundant arrays, calibrating to incomplete sky models, and constraining calibration solutions across frequency.
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DOI：
10.3847/1538-4357/ab40a8
发表时间：
2019-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
N. Barry;M. Wilensky;C. Trott;B. Pindor;A. Beardsley;B. Hazelton;I. Sullivan;M. Morales;J. Pober;J. Line;B. Greig;R. Byrne;A. Lanman;W. Li;C. Jordan;R. Joseph;B. McKinley;M. Rahimi;S. Yoshiura;J. Bowman;B. Gaensler;J. Hewitt;D. Jacobs;D. Mitchell;N. Udaya Shankar;S. Sethi;R. Subrahmanyan;S. Tingay;R. Webster;J. Wyithe
通讯作者：
N. Barry;M. Wilensky;C. Trott;B. Pindor;A. Beardsley;B. Hazelton;I. Sullivan;M. Morales;J. Pober;J. Line;B. Greig;R. Byrne;A. Lanman;W. Li;C. Jordan;R. Joseph;B. McKinley;M. Rahimi;S. Yoshiura;J. Bowman;B. Gaensler;J. Hewitt;D. Jacobs;D. Mitchell;N. Udaya Shankar;S. Sethi;R. Subrahmanyan;S. Tingay;R. Webster;J. Wyithe
通过未来的红移巡天测量星系功率谱
DOI：
10.1086/305663
发表时间：
1997
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Max Tegmark;A. Hamilton;M. Strauss;M. Vogeley;A. Szalay
通讯作者：
A. Szalay
再电离阵列氢历元的绝对标定策略及其对 21 cm 功率谱的影响
DOI：
10.3847/1538-4357/ab67bc
发表时间：
2020
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Kern, Nicholas S.;Dillon, Joshua S.;Parsons, Aaron R.;Carilli, Christopher L.;Bernardi, Gianni;Abdurashidova, Zara;Aguirre, James E.;Alexander, Paul;Ali, Zaki S.;Balfour, Yanga
通讯作者：
Balfour, Yanga
影响因子：
4.8
作者：
J. Dillon;Max E. Lee;Z. Ali;A. Parsons;Naomi Orosz;C. Nunhokee;P. Plante;A. Beardsley;N. Kern;Zara Abdurashidova;J. Aguirre;P. Alexander;Yanga Balfour;G. Bernardi;T. Billings;J. Bowman;R. Bradley;P. Bull;Jacob Burba;S. Carey;C. Carilli;Carina Cheng;D. DeBoer;M. Dexter;E. D. L. Acedo;J. Ely;A. Ewall-Wice;N. Fagnoni;Randall Fritz;S. Furlanetto;K. Gale-Sides;B. Glendenning;Deepthi Gorthi;B. Greig;J. Grobbelaar;Ziyaad Halday;B. Hazelton;J. Hewitt;J. Hickish;D. Jacobs;A. Julius;Joshua Kerrigan;P. Kittiwisit;S. Kohn;M. Kolopanis;A. Lanman;Telalo Lekalake;David Lewis;Adrian Liu;Yin-Zhe Ma;D. MacMahon;Lourence Malan;Cresshim Malgas;M. Maree;Z. Martinot;Eunice Matsetela;A. Mesinger;Mathakane Molewa;M. Morales;Tshegofalang Mosiane;S. Murray;A. Neben;B. Nikolic;R. Pascua;Nipanjana Patra;Samantha Pieterse;J. Pober;N. Razavi-Ghods;J. Ringuette;J. Robnett;K. Rosie;Mário G. Santos;P. Sims;Craig H. Smith;A. Syce;Max Tegmark;N. Thyagarajan;P. Williams;Haoxuan Zheng
通讯作者：
J. Dillon;Max E. Lee;Z. Ali;A. Parsons;Naomi Orosz;C. Nunhokee;P. Plante;A. Beardsley;N. Kern;Zara Abdurashidova;J. Aguirre;P. Alexander;Yanga Balfour;G. Bernardi;T. Billings;J. Bowman;R. Bradley;P. Bull;Jacob Burba;S. Carey;C. Carilli;Carina Cheng;D. DeBoer;M. Dexter;E. D. L. Acedo;J. Ely;A. Ewall-Wice;N. Fagnoni;Randall Fritz;S. Furlanetto;K. Gale-Sides;B. Glendenning;Deepthi Gorthi;B. Greig;J. Grobbelaar;Ziyaad Halday;B. Hazelton;J. Hewitt;J. Hickish;D. Jacobs;A. Julius;Joshua Kerrigan;P. Kittiwisit;S. Kohn;M. Kolopanis;A. Lanman;Telalo Lekalake;David Lewis;Adrian Liu;Yin-Zhe Ma;D. MacMahon;Lourence Malan;Cresshim Malgas;M. Maree;Z. Martinot;Eunice Matsetela;A. Mesinger;Mathakane Molewa;M. Morales;Tshegofalang Mosiane;S. Murray;A. Neben;B. Nikolic;R. Pascua;Nipanjana Patra;Samantha Pieterse;J. Pober;N. Razavi-Ghods;J. Ringuette;J. Robnett;K. Rosie;Mário G. Santos;P. Sims;Craig H. Smith;A. Syce;Max Tegmark;N. Thyagarajan;P. Williams;Haoxuan Zheng
DOI：
10.3847/1538-4357/ab2f72
发表时间：
2018-02
期刊：
The Astrophysical Journal
影响因子：
--
作者：
S. Kohn;J. Aguirre;P. Plante;T. Billings;P. Chichura;A. F. Fortino;A. Igarashi;Roshan K. Benefo;S. Gallardo;Z. Martinot;C. Nunhokee;N. Kern;P. Bull;Adrian Liu;P. Alexander;Z. Ali;A. Beardsley;G. Bernardi;J. Bowman;R. Bradley;C. Carilli;Carina Cheng;D. DeBoer;E. D. L. Acedo;J. Dillon;A. Ewall-Wice;G. Fadana;N. Fagnoni;Randall Fritz;S. Furlanetto;B. Glendenning;B. Greig;J. Grobbelaar;B. Hazelton;J. Hewitt;J. Hickish;D. Jacobs;A. Julius;M. Kariseb;M. Kolopanis;Telalo Lekalake;A. Loots;D. MacMahon;Lourence Malan;Cresshim Malgas;M. Maree;Nathan Mathison;Eunice Matsetela;A. Mesinger;M. Morales;A. Neben;B. Nikolic;A. Parsons;Nipanjana Patra;Samantha Pieterse;J. Pober;N. Razavi-Ghods;J. Ringuette;J. Robnett;K. Rosie;R. Sell;Craig H. Smith;A. Syce;Max Tegmark;N. Thyagarajan;P. Williams;Haoxuan Zheng
通讯作者：
S. Kohn;J. Aguirre;P. Plante;T. Billings;P. Chichura;A. F. Fortino;A. Igarashi;Roshan K. Benefo;S. Gallardo;Z. Martinot;C. Nunhokee;N. Kern;P. Bull;Adrian Liu;P. Alexander;Z. Ali;A. Beardsley;G. Bernardi;J. Bowman;R. Bradley;C. Carilli;Carina Cheng;D. DeBoer;E. D. L. Acedo;J. Dillon;A. Ewall-Wice;G. Fadana;N. Fagnoni;Randall Fritz;S. Furlanetto;B. Glendenning;B. Greig;J. Grobbelaar;B. Hazelton;J. Hewitt;J. Hickish;D. Jacobs;A. Julius;M. Kariseb;M. Kolopanis;Telalo Lekalake;A. Loots;D. MacMahon;Lourence Malan;Cresshim Malgas;M. Maree;Nathan Mathison;Eunice Matsetela;A. Mesinger;M. Morales;A. Neben;B. Nikolic;A. Parsons;Nipanjana Patra;Samantha Pieterse;J. Pober;N. Razavi-Ghods;J. Ringuette;J. Robnett;K. Rosie;R. Sell;Craig H. Smith;A. Syce;Max Tegmark;N. Thyagarajan;P. Williams;Haoxuan Zheng