Cosmology Large Angular Scale Surveyor (CLASS): pointing stability and beam measurements at 90, 150, and 220 GHz
Cosmology Large Angular Scale Surveyor (CLASS): pointing stability and beam measurements at 90, 150, and 220 GHz
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宇宙学大角尺度测量仪 (CLASS):90、150 和 220 GHz 的指向稳定性和波束测量
DOI:
10.1117/12.2630649
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Cleary, Joseph
中科院分区:
文献类型:
--
作者:
Datta, Rahul;Brewer, Michael K.;Denes Couto, Jullianna D.;Eimer, Joseph R.;Li, Yunyang;Xu, Zhilei;Appel, John W.;Bustos, Ricardo;Chuss, David;Cleary, Joseph
The Cosmology Large Angular Scale Surveyor (CLASS) telescope array surveys 75% of the sky from the Atacama desert in Chile at frequency bands centered near 40, 90, 150, and 220 GHz. CLASS measures the largest-angular scale (θ ≳ 1 ◦ ) CMB polarization with the aim of constraining the tensor-to-scalar ratio, r, measuring the optical depth to reionization, τ , to near the cosmic variance limit, and more. The CLASS Q-band (40 GHz), W-band (90 GHz), and dichroic high frequency (150/220 GHz) telescopes have been observing since June 2016, May 2018, and September 2019, respectively. On-sky optical characterization of the 40 GHz instrument has been published. Here, we present preliminary on-sky measurements of the beams at 90, 150, and 220 GHz, and pointing stability of the 90 and 150/220 GHz telescopes. The average 90, 150, and 220 GHz beams measured from dedicated observations of Jupiter have full width at half maximum (FWHM) of 0.615±0.019◦ , 0.378±0.005◦ , and 0.266 ± 0.008◦ , respectively. Telescope pointing variations are within a few % of the beam FWHM.
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DOI:
10.1117/12.2313614
发表时间:
2018
期刊:
and Far-Infrared Detectors and Instrumentation for Astronomy IX
影响因子:
--
作者:
Harrington, Kathleen;Ali, Aamir;Appel, John W.;Bennett, Charles L.;Brewer, Michael;Bustos, Ricardo;Chan, Manwei;Chuss, David T.;Cleary, Joseph;Denes Couto, Jullianna
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10.1117/12.2233125
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期刊:
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通讯作者:
K. Harrington;T. Marriage;Aamir Ali;J. Appel;C. Bennett;F. Boone;M. Brewer;M. Chan;D. Chuss;F. Colazo;S. Dahal;K. Denis;R. Dünner;J. Eimer;T. Essinger-Hileman;P. Fluxà;M. Halpern;G. Hilton;G. Hinshaw;J. Hubmayr;J. Iuliano;J. Karakla;J. McMahon;N. Miller;S. Moseley;G. Palma;L. Parker;M. Petroff;Basti'an Pradenas;K. Rostem;Marco Sagliocca;Deniz A. N. Valle;D. Watts;Edward J. Wollack;Zhilei Xu;L. Zeng
影响因子:
1.9
作者:
J. Eimer;C. Bennett;D. Chuss;T. Marriage;Edward J. Wollack;L. Zeng
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L. Zeng
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10.1117/12.2234308
发表时间:
2016
期刊:
SPIE Proceedings
影响因子:
--
作者:
Holland, Wayne S.;Zmuidzinas, Jonas;Rostem, Karwan;Ali, Aamir;Appel, John W.;Bennett, Charles L.;Brown, Ari;Chang, Meng-Ping;Chuss, David T.;Colazo, Felipe A.
通讯作者:
Colazo, Felipe A.
DOI:
10.3847/0004-637x/818/2/151
发表时间:
2015
期刊:
The Astrophysical Journal
影响因子:
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作者:
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