The Atacama Cosmology Telescope: measurement and analysis of 1D beams for DR4
The Atacama Cosmology Telescope: measurement and analysis of 1D beams for DR4
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阿塔卡马宇宙学望远镜:DR4 一维光束的测量和分析
DOI:
10.1088/1475-7516/2022/05/044
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发表时间:
2022
影响因子:
6.4
通讯作者:
Gallardo, Patricio A.
中科院分区:
文献类型:
--
作者:
Lungu, Marius;Storer, Emilie R.;Hasselfield, Matthew;Duivenvoorden, Adriaan J.;Calabrese, Erminia;Chesmore, Grace E.;Choi, Steve K.;Dunkley, Jo;Dünner, Rolando;Gallardo, Patricio A.
We describe the measurement and treatment of the telescope beams for the Atacama Cosmology Telescope's fourth data release, DR4. Observations of Uranus are used to measure the central portion (< 12') of the beams to roughly-40 dB of the peak. Such planet maps in intensity are used to construct azimuthally averaged beam profiles, which are fit with a physically motivated model before being transformed into Fourier space. We investigate and quantify a number of percent-level corrections to the beams, all of which are important for precision cosmology. Uranus maps in polarization are used to measure the temperature-to-polarization leakage in the main part of the beams, which is≲ 1%(2.5%) at 150 GHz (98 GHz). The beams also have polarized sidelobes, which are measured with observations of Saturn and deprojected from the ACT time-ordered data. Notable changes relative to past ACT beam analyses include an improved subtraction of the atmospheric effects from Uranus calibration maps, incorporation of a scattering term in the beam profile model, and refinements to the beam model uncertainties and the main temperature-to-polarization leakage terms in the ACT power spectrum analysis.
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影响因子:
6.5
作者:
M. Reinecke;K. Dolag;R. Hell;M. Bartelmann;T. Ensslin
通讯作者:
T. Ensslin
影响因子:
6.5
作者:
H. Schmid;F. Joos;D. Tschan
通讯作者:
D. Tschan
影响因子:
6.8
作者:
AKAIKE, H
通讯作者:
AKAIKE, H
DOI:
10.1088/1475-7516/2020/12/045
发表时间:
2020-12-01
影响因子:
6.4
作者:
Choi, Steve K.;Hasselfield, Matthew;Zhu, Ningfeng
通讯作者:
Zhu, Ningfeng
影响因子:
5
作者:
B. Wandelt;K. Gorski
通讯作者:
K. Gorski