Controlling systematics in ground-based CMB surveys with partial boresight rotation
Controlling systematics in ground-based CMB surveys with partial boresight rotation
复制标题
通过部分视轴旋转控制地基 CMB 测量中的系统
DOI：
10.1093/mnras/stz2607
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发表时间：
2020
影响因子：
4.8
通讯作者：
Thomas D
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文献类型：
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作者：
Thomas D
未来的CMB实验将需要精细的系统控制，以限制B模式偏振功率谱。需要仔细研究的一类系统学是工具系统学。这种系统的潜在影响是最容易理解的，考虑分析管道对差分的基础上。在这种情况下，一对中的两个检测器之间的任何差分增益、指向或光束椭圆率都可能导致强度泄漏到B模式光谱中，由于与B模式信号相比总强度信号的幅度大得多，因此需要将其控制到高精度。一种众所周知的抑制这种系统性的方法是通过仔细设计扫描策略，特别是利用任何使仪器围绕其指向（bobbin）方向旋转的能力。在这里，我们表明，这种部分bodies旋转角度的具体选择与冗余扫描策略中存在的组合是一个强大的方法，用于抑制系统的影响。这种缓解可以在地图制作之前的分析中执行，并且与其他方法（例如，解投影或滤波）相比，不会导致信号损失。我们明确展示了我们的方法与时间有序的数据模拟相关的下一代地基CMB实验，使用深，宽扫描策略，适合在智利的实验。这些模拟表明，减少了多个数量级的spuriousB模式信号所产生的差分增益和差分指向系统。
Future CMB experiments will require exquisite control of systematics in order to constrain theB-mode polarization power spectrum. One class of systematics that requires careful study is instrumental systematics. The potential impact of such systematics is most readily understood by considering analysis pipelines based on pair differencing. In this case, any differential gain, pointing or beam ellipticity between the two detectors in a pair can result in intensity leakage into theB-mode spectrum, which needs to be controlled to a high precision due to the much greater magnitude of the total intensity signal as compared to theB-mode signal. One well-known way to suppress such systematics is through careful design of the scan-strategy, in particular making use of any capability to rotate the instrument about its pointing (boresight) direction. Here, we show that the combination of specific choices of such partial boresight rotation angles with redundancies present in the scan strategy is a powerful approach for suppressing systematic effects. This mitigation can be performed in analysis in advance of map-making and, in contrast to other approaches (e.g. deprojection or filtering), results in no signal loss. We demonstrate our approach explicitly with time ordered data simulations relevant to next-generation ground-based CMB experiments, using deep and wide scan strategies appropriate for experiments based in Chile. These simulations show a reduction of multiple orders of magnitude in the spuriousB-mode signal arising from differential gain and differential pointing systematics.
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DOI：
10.1117/12.2313898
发表时间：
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通讯作者：
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DOI：
10.3847/1538-4357/aa8e9f
发表时间：
2017-05
期刊：
The Astrophysical Journal
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作者：
T. C. C. P. Ade-T.-C.-C.-P.-Ade-103029307;M. Aguilar;Y. Akiba;K. Arnold;C. Baccigalupi;D. Barron;D. Beck;F. Bianchini;D. Boettger;J. Borrill;S. Chapman;Y. Chinone;K. Crowley;A. Cukierman;M. Dobbs;A. Ducout;R. Dunner;T. Elleflot;J. Errard;G. Fabbian;S. Feeney;C. Feng;T. Fujino;N. Galitzki;A. Gilbert;N. Goeckner-wald;J. Groh;T. Hamada;G. Hall;N. Halverson;M. Hasegawa;M. Hazumi;C. Hill;L. Howe;Y. Inoue;G. Jaehnig;A. Jaffe;O. Jeong;D. Kaneko;N. Katayama;B. Keating;R. Keskitalo;T. Kisner;N. Krachmalnicoff;A. Kusaka;M. Jeune;A. Lee;E. Leitch;D. Leon;E. Linder;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;J. Montgomery;M. Navaroli;H. Nishino;H. Paar;J. Peloton;A. Pham;D. Poletti;G. Puglisi;C. Reichardt;P. Richards;C. Ross;Y. Segawa;B. Sherwin;M. Silva-Feaver;Praweeen Siritanasak;N. Stebor;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;T. Tomaru;C. Tucker;N. Whitehorn;A. Zahn
通讯作者：
T. C. C. P. Ade-T.-C.-C.-P.-Ade-103029307;M. Aguilar;Y. Akiba;K. Arnold;C. Baccigalupi;D. Barron;D. Beck;F. Bianchini;D. Boettger;J. Borrill;S. Chapman;Y. Chinone;K. Crowley;A. Cukierman;M. Dobbs;A. Ducout;R. Dunner;T. Elleflot;J. Errard;G. Fabbian;S. Feeney;C. Feng;T. Fujino;N. Galitzki;A. Gilbert;N. Goeckner-wald;J. Groh;T. Hamada;G. Hall;N. Halverson;M. Hasegawa;M. Hazumi;C. Hill;L. Howe;Y. Inoue;G. Jaehnig;A. Jaffe;O. Jeong;D. Kaneko;N. Katayama;B. Keating;R. Keskitalo;T. Kisner;N. Krachmalnicoff;A. Kusaka;M. Jeune;A. Lee;E. Leitch;D. Leon;E. Linder;L. Lowry;F. Matsuda;T. Matsumura;Y. Minami;J. Montgomery;M. Navaroli;H. Nishino;H. Paar;J. Peloton;A. Pham;D. Poletti;G. Puglisi;C. Reichardt;P. Richards;C. Ross;Y. Segawa;B. Sherwin;M. Silva-Feaver;Praweeen Siritanasak;N. Stebor;R. Stompor;A. Suzuki;O. Tajima;S. Takakura;S. Takatori;D. Tanabe;G. Teply;T. Tomaru;C. Tucker;N. Whitehorn;A. Zahn
影响因子：
2
作者：
R. Gualtieri;J. Filippini;P. Ade;M. Amiri;S. J. Benton;A. Bergman;R. Bihary;J. Bock;J. Bond;S. Bryan;H. Chiang;C. Contaldi;O. Doré;A. Duivenvoorden;H. Eriksen;M. Farhang;M. Farhang;L. Fissel;L. Fissel;A. Fraisse;K. Freese;K. Freese;M. Galloway;A. Gambrel;N. Gandilo;N. Gandilo;K. Ganga;R. Gramillano;J. Gudmundsson;M. Halpern;J. Hartley;M. Hasselfield;G. Hilton;W. Holmes;V. Hristov;Zhiqi Huang;K. Irwin;W. Jones;C. Kuo;Z. Kermish;S. Li;S. Li;P. Mason;K. Megerian;L. Moncelsi;T. Morford;J. Nagy;J. Nagy;C. Netterfield;M. Nolta;B. Osherson;I. Padilla;I. Padilla;B. Racine;B. Racine;A. Rahlin;A. Rahlin;C. Reintsema;J. Ruhl;M. Runyan;T. M. Ruud;J. Shariff;J. Soler;J. Soler;X. Song;A. Trangsrud;C. Tucker;R. Tucker;A. Turner;J. V. D. List;A. Weber;I. Wehus;D. Wiebe;E. Young
通讯作者：
R. Gualtieri;J. Filippini;P. Ade;M. Amiri;S. J. Benton;A. Bergman;R. Bihary;J. Bock;J. Bond;S. Bryan;H. Chiang;C. Contaldi;O. Doré;A. Duivenvoorden;H. Eriksen;M. Farhang;M. Farhang;L. Fissel;L. Fissel;A. Fraisse;K. Freese;K. Freese;M. Galloway;A. Gambrel;N. Gandilo;N. Gandilo;K. Ganga;R. Gramillano;J. Gudmundsson;M. Halpern;J. Hartley;M. Hasselfield;G. Hilton;W. Holmes;V. Hristov;Zhiqi Huang;K. Irwin;W. Jones;C. Kuo;Z. Kermish;S. Li;S. Li;P. Mason;K. Megerian;L. Moncelsi;T. Morford;J. Nagy;J. Nagy;C. Netterfield;M. Nolta;B. Osherson;I. Padilla;I. Padilla;B. Racine;B. Racine;A. Rahlin;A. Rahlin;C. Reintsema;J. Ruhl;M. Runyan;T. M. Ruud;J. Shariff;J. Soler;J. Soler;X. Song;A. Trangsrud;C. Tucker;R. Tucker;A. Turner;J. V. D. List;A. Weber;I. Wehus;D. Wiebe;E. Young