Two-year Cosmology Large Angular Scale Surveyor (CLASS) Observations: 40 GHz Telescope Pointing, Beam Profile, Window Function, and Polarization Performance

被引：22

作者：

Xu, Zhilei ^{[1
,2
]}

Brewer, Michael K. ^{[2
]}

Rojas, Pedro Fluxa ^{[3
,4
]}

Li, Yunyang ^{[2
]}

Osumi, Keisuke ^{[2
]}

Pradenas, Bastian ^{[2
,5
]}

Ali, Aamir ^{[2
,6
]}

Appel, John W. ^{[2
]}

Bennett, Charles L. ^{[2
]}

Bustos, Ricardo ^{[7
]}

Chan, Manwei ^{[2
]}

Chuss, David T. ^{[8
]}

Cleary, Joseph ^{[2
]}

Couto, Jullianna Denes ^{[2
]}

Dahal, Sumit ^{[2
]}

Datta, Rahul ^{[2
]}

Denis, Kevin L. ^{[9
]}

Dunner, Rolando ^{[3
,4
]}

Eimer, Joseph R. ^{[2
]}

Essinger-Hileman, Thomas ^{[2
,9
]}

Gothe, Dominik ^{[2
]}

Harrington, Kathleen ^{[2
,10
]}

Iuliano, Jeffrey ^{[2
]}

Karakla, John ^{[2
]}

Marriage, Tobias A. ^{[2
]}

Miller, Nathan J. ^{[2
,9
]}

Nunez, Carolina ^{[2
]}

Padilla, Ivan L. ^{[2
]}

Parker, Lucas ^{[2
,11
]}

Petroff, Matthew A. ^{[2
]}

Reeves, Rodrigo ^{[12
]}

Rostem, Karwan ^{[9
]}

Valle, Deniz Augusto ^{[2
]}

Watts, Duncan J. ^{[2
]}

Weiland, Janet L. ^{[2
]}

Wollack, Edward J. ^{[9
]}

机构：

[1] Univ Penn, Dept Phys & Astron, 209 South 33rd St, Philadelphia, PA 19104 USA

[2] Johns Hopkins Univ, Dept Phys & Astron, 3701 San Martin Dr, Baltimore, MD 21218 USA

[3] Pontificia Univ Catolica Chile, Inst Astrofis, Fac Fis, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile

[4] Pontificia Univ Catolica Chile, Ctr Astroingn, Fac Fis, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile

[5] Univ Chile, FCFM, Dept Fis, Blanco Encalada 2008, Santiago, Chile

[6] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[7] Univ Catolica Santisima Concepcion, Fac Ingn, Alonso Ribera 2850, Concepcion, Chile

[8] Villanova Univ, Dept Phys, 800 Lancaster Ave, Villanova, PA 19085 USA

[9] Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA

[10] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA

[11] Los Alamos Natl Lab, Space & Remote Sensing, MS B244, Los Alamos, NM 87544 USA

[12] Univ Concepcion, Dept Astron, CePIA, Concepcion, Chile

来源：

ASTROPHYSICAL JOURNAL | 2020年 / 891卷 / 02期

基金：

美国国家科学基金会;

关键词：

INFLATIONARY UNIVERSE; DIELECTRIC-PROPERTIES; RADIO-EMISSION; MICROWAVE; TRANSITION; MOON; EDGE; FLATNESS; HORIZON; SYSTEM;

D O I：

10.3847/1538-4357/ab76c2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Cosmology Large Angular Scale Surveyor (CLASS) is a telescope array that observes the cosmic microwave background (CMB) over 75% of the sky from the Atacama Desert, Chile, at frequency bands centered near 40, 90, 150, and 220 GHz. CLASS measures the large angular scale (1 degrees less than or similar to theta <= 90 degrees) CMB polarization to constrain the tensor-to-scalar ratio at the r similar to 0.01 level and the optical depth to last scattering to the sample variance limit. This paper presents the optical characterization of the 40 GHz telescope during its first observation era, from 2016 September to 2018 February. High signal-to-noise observations of the Moon establish the pointing and beam calibration. The telescope boresight pointing variation is <0.degrees 023 (<1.6% of the beam's full width at half maximum (FWHM)). We estimate beam parameters per detector and in aggregate, as in the CMB survey maps. The aggregate beam has an FWHM of 1.degrees 579 +/- 0.degrees 001 and a solid angle of 838 +/- 6 mu sr, consistent with physical optics simulations. The corresponding beam window function has a sub-percent error per multipole at l < 200. An extended 90 degrees beam map reveals no significant far sidelobes. The observed Moon polarization shows that the instrument polarization angles are consistent with the optical model and that the temperature-to-polarization leakage fraction is <10(-4) (95% C.L.). We find that the Moon-based results are consistent with measurements of M42, RCW.38, and Tau A from CLASS's CMB survey data. In particular, Tau A measurements establish degree-level precision for instrument polarization angles.

引用

页数：25

共 87 条

[1]

Adachi S., 2019, ARXIV191002608

[2] BICEP2/Keck Array XI: Beam Characterization and Temperature-to-Polarization Leakage in the BK15 Data Set [J].

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. .

ASTROPHYSICAL JOURNAL, 2019, 884 (02)

[3] Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season [J].

Ade, P. A. R. ;

Ahmed, Z. ;

Aikin, R. W. ;

Alexander, K. D. ;

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. ;

Dvorkin, C. ;

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. .

PHYSICAL REVIEW LETTERS, 2018, 121 (22)

[4] A Measurement of the Cosmic Microwave Background B-mode Polarization Power Spectrum at Subdegree Scales from Two Years of POLARBEAR Data [J].

Ade, P. A. R. ;

Aguilar, M. ;

Akiba, Y. ;

Arnold, K. ;

Baccigalupi, C. ;

Barron, D. ;

Beck, D. ;

Bianchini, F. ;

Boettger, D. ;

Borrill, J. ;

Chapman, S. ;

Chinone, Y. ;

Crowley, K. ;

Cukierman, A. ;

Dunner, R. ;

Dobbs, M. ;

Ducout, A. ;

Elleflot, T. ;

Errard, J. ;

Fabbian, G. ;

Feeney, S. M. ;

Feng, C. ;

Fujino, T. ;

Galitzki, N. ;

Gilbert, A. ;

Goeckner-Wald, N. ;

Groh, J. C. ;

Hall, G. ;

Halverson, N. ;

Hamada, T. ;

Hasegawa, M. ;

Hazumi, M. ;

Hill, C. A. ;

Howe, L. ;

Inoue, Y. ;

Jaehnig, G. ;

Jaffe, A. H. ;

Jeong, O. ;

Kaneko, D. ;

Katayama, N. ;

Keating, B. ;

Keskitalo, R. ;

Kisner, T. ;

Krachmalnicoff, N. ;

Kusaka, A. ;

Le Jeune, M. ;

Lee, A. T. ;

Leitch, E. M. ;

Leon, D. ;

Linder, E. .

ASTROPHYSICAL JOURNAL, 2017, 848 (02)

[5] BICEP2/KECK ARRAY VIII: MEASUREMENT OF GRAVITATIONAL LENSING FROM LARGE-SCALE B-MODE POLARIZATION [J].

Ade, P. A. R. ;

Ahmed, Z. ;

Aikin, R. W. ;

Alexander, K. D. ;

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. ;

Crill, B. P. ;

Duband, L. ;

Dyorkin, C. ;

Filippini, J. P. ;

Fliescher, S. ;

Grayson, J. ;

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. ;

Kernasoyskiy, S. A. ;

Kovac, J. M. ;

Kuo, C. L. ;

Leitch, E. M. ;

Lueker, M. ;

Megerian, K. G. ;

Namikawa, T. ;

Netterfield, C. B. ;

Nguyen, H. T. ;

O'Brient, R. ;

Ogburn, R. W. ;

Orlando, A. ;

Pryke, C. ;

Richter, S. ;

Schwarz, R. ;

Sheehy, C. D. ;

Staniszewski, Z. K. ;

Steinbach, B. .

ASTROPHYSICAL JOURNAL, 2016, 833 (02)

[6] BICEP2/KECK ARRAY. IV. OPTICAL CHARACTERIZATION AND PERFORMANCE OF THE BICEP2 AND KECK ARRAY EXPERIMENTS [J].

Ade, P. A. R. ;

Aikin, R. W. ;

Barkats, D. ;

Benton, S. J. ;

Bischoff, C. A. ;

Bock, J. J. ;

Bradford, K. J. ;

Brevik, J. A. ;

Buder, I. ;

Bullock, E. ;

Dowell, C. D. ;

Duband, L. ;

Filippini, J. P. ;

Fliescher, S. ;

Golwala, S. R. ;

Halpern, M. ;

Hasselfield, M. ;

Hildebrandt, S. R. ;

Hilton, G. C. ;

Hui, H. ;

Irwin, K. D. ;

Kang, J. H. ;

Karkare, K. S. ;

Kaufman, J. P. ;

Keating, B. G. ;

Kefeli, S. ;

Kernasovskiy, S. A. ;

Kovac, J. M. ;

Kuo, C. L. ;

Leitch, E. M. ;

Lueker, M. ;

Megerian, K. G. ;

Netterfield, C. B. ;

Nguyen, H. T. ;

O'Brient, R. ;

Ogburn, R. W. ;

Orlando, A. ;

Pryke, C. ;

Richter, S. ;

Schwarz, R. ;

Sheehy, C. D. ;

Staniszewski, Z. K. ;

Sudiwala, R. V. ;

Teply, G. P. ;

Thompson, K. ;

Tolan, J. E. ;

Turner, A. D. ;

Vieregg, A. G. ;

Weber, A. C. ;

Wong, C. L. .

ASTROPHYSICAL JOURNAL, 2015, 806 (02)

[7] Measurement of the Cosmic Microwave Background Polarization Lensing Power Spectrum with the POLARBEAR Experiment [J].

Ade, P. A. R. ;

Akiba, Y. ;

Anthony, A. E. ;

Arnold, K. ;

Atlas, M. ;

Barron, D. ;

Boettger, D. ;

Borrill, J. ;

Chapman, S. ;

Chinone, Y. ;

Dobbs, M. ;

Elleflot, T. ;

Errard, J. ;

Fabbian, G. ;

Feng, C. ;

Flanigan, D. ;

Gilbert, A. ;

Grainger, W. ;

Halverson, N. W. ;

Hasegawa, M. ;

Hattori, K. ;

Hazumi, M. ;

Holzapfel, W. L. ;

Hori, Y. ;

Howard, J. ;

Hyland, P. ;

Inoue, Y. ;

Jaehnig, G. C. ;

Jaffe, A. ;

Keating, B. ;

Kermish, Z. ;

Keskitalo, R. ;

Kisner, T. ;

Le Jeune, M. ;

Lee, A. T. ;

Linder, E. ;

Leitch, E. M. ;

Lungu, M. ;

Matsuda, F. ;

Matsumura, T. ;

Meng, X. ;

Miller, N. J. ;

Morii, H. ;

Moyerman, S. ;

Myers, M. J. ;

Navaroli, M. ;

Nishino, H. ;

Paar, H. ;

Peloton, J. ;

Quealy, E. .

PHYSICAL REVIEW LETTERS, 2014, 113 (02)

[8] COSMOLOGY FOR GRAND UNIFIED THEORIES WITH RADIATIVELY INDUCED SYMMETRY-BREAKING [J].

ALBRECHT, A ;

STEINHARDT, PJ .

PHYSICAL REVIEW LETTERS, 1982, 48 (17) :1220-1223

[9] Towards a cosmological neutrino mass detection [J].

Allison, R. ;

Caucal, P. ;

Calabrese, E. ;

Dunkley, J. ;

Louis, T. .

PHYSICAL REVIEW D, 2015, 92 (12)

[10]

[Anonymous], 2016, ASTRON ASTROPHYS, V594, pA13, DOI [DOI 10.1051/0004-6361/201526914, 10.1051/0004-6361/201526914, DOI 10.1051/0004-6361/201525830]

← 1 2 3 4 5 6 7 8 9 →