QUBIC II: Spectral polarimetry with bolometric interferometry

Bolometric interferometry is a novel technique that has the ability to perform spectral imaging. A bolometric interferometer observes the sky in a wide frequency band and can reconstruct sky maps in several sub-bands within the physical band in post-processing of the data. This provides a powerful spectral method to discriminate between the cosmic microwave background (CMB) and astrophysical foregrounds. In this paper, the methodology is illustrated with examples based on the Q & U Bolometric Interferometer for Cosmology (QUBIC) which is a ground-based instrument designed to measure the B-mode polarization of the sky at millimeter wavelengths. We consider the specific cases of point source reconstruction and Galactic dust mapping and we characterize the point spread function as a function of frequency. We study the noise properties of spectral imaging, especially the correlations between sub-bands, using end-to-end simulations together with a fast noise simulator. We conclude showing that spectral imaging performance are nearly optimal up to five sub-bands in the case of QUBIC.

Note:

27 pages, 18 figures. Accepted by JCAP on July 6, 2021. Second paper of series of 8 in a special JCAP edition on QUBIC

CMBR experiments
CMBR theory
cosmological parameters from CMBR
gravitational waves and CMBR polarization

References(45)

Figures(21)

[1]

A Measurement of excess antenna temperature at 4080-Mc/s

- Astrophys.J. 142 (1965) 419-421
•
DOI:
- 10.1086/148307

[2]

The Temperature of the Cosmic Microwave Background

D.J. Fixsen
(
- Maryland U. and
- NASA, Goddard
)

- Astrophys.J. 707 (2009) 916-920
•
e-Print:
- 0911.1955
•
DOI:
- 10.1088/0004-637X/707/2/916

[3]

Measurements of B-mode Polarization of the Cosmic Microwave Background from 500 Square Degrees of SPTpol Data

SPT

Collaboration

•

J.T. Sayre
(
- Colorado U. and
- Case Western Reserve U., CERCA
)

et al.

- Phys.Rev.D 101 (2020) 12, 122003
•
e-Print:
- 1910.05748
•
DOI:
- 10.1103/PhysRevD.101.122003

Detection of Galactic and Extragalactic Millimeter-wavelength Transient Sources with SPT-3G

SPT-3G

Collaboration

•

S. Guns
(
- UC, Berkeley
)

et al.

- Astrophys.J. 916 (2021) 2, 98
•
e-Print:
- 2103.06166
•
DOI:
- 10.3847/1538-4357/ac06a3

[5]

A Measurement of the Degree Scale CMB $B$ -mode Angular Power Spectrum with POLARBEAR

POLARBEAR

Collaboration

•

S. Adachi
(
- Kyoto U.
)

et al.

- Astrophys.J. 897 (2020) 1, 55
•
e-Print:
- 1910.02608
•
DOI:
- 10.3847/1538-4357/ab8f24

[6]

The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz

ACT

Collaboration

•

Steve K. Choi
(
)

et al.

- JCAP 12 (2020) 045
•
e-Print:
- 2007.07289
•
DOI:
- 10.1088/1475-7516/2020/12/045

[7]

The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters

ACT

Collaboration

•

Simone Aiola
(
- CCA, New York and
- Princeton U.
)

et al.

- JCAP 12 (2020) 047
•
e-Print:
- 2007.07288
•
DOI:
- 10.1088/1475-7516/2020/12/047

[8]

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

Zhilei Xu
(
- Johns Hopkins U. (main) and
- Penn State U.
)
,
Michael K. Brewer
(
- Johns Hopkins U. (main)
)
,
Pedro Fluxá Rojas
(
- Chile U., Catolica
)
,
Yunyang Li
(
- Johns Hopkins U. (main)
)
,
Keisuke Osumi
(
- Johns Hopkins U. (main)
)

et al.

- Astrophys.J. 891 134
•
e-Print:
- 1911.04499
•
DOI:
- 10.3847/1538-4357/ab76c2

[9]

BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season

BICEP2 and
Keck Array

Collaborations

•

P.A.R. Ade
(
- Cardiff U.
)

et al.

- Phys.Rev.Lett. 121 (2018) 221301
•
e-Print:
- 1810.05216
•
DOI:
- 10.1103/PhysRevLett.121.221301

[10]

The CLASS 150/220 GHz Polarimeter Array: Design, Assembly, and Characterization

et al.

- J.Low Temp.Phys. 199 (2020) 1-2, 289-297
•
e-Print:
- 1908.00480
•
DOI:
- 10.1007/s10909-019-02317-0

[11]

The POLARBEAR-2 and the Simons Array Experiment

POLARBEAR

Collaboration

•

A. Suzuki
(
- UC, Berkeley
)

et al.

- J.Low Temp.Phys. 184 (2016) 3-4, 805-810
•
e-Print:
- 1512.07299
•
DOI:
- 10.1007/s10909-015-1425-4

[12]

Advanced ACTPol Cryogenic Detector Arrays and Readout

S.W. Henderson
(
- Cornell U., Phys. Dept.
)
,
R. Allison
(
- Oxford U.
)
,
J. Austermann
(
- NIST, Boulder
)
,
T. Baildon
(
- Michigan U.
)
,
N. Battaglia
(
- Princeton U.
)

et al.

- J.Low Temp.Phys. 184 (2016) 3-4, 772-779
•
e-Print:
- 1510.02809
•
DOI:
- 10.1007/s10909-016-1575-z

[13]

Design and Performance of the First BICEP Array Receiver

A. Schillaci
(
- Caltech, Pasadena (main)
)
,
P.A.R. Ade
(
- Cardiff U.
)
,
Z. Ahmed
(
- KIPAC, Menlo Park and
- Stanford U., Phys. Dept.
)
,
M. Amiri
(
- British Columbia U.
)
,
D. Barkats
(
- Harvard-Smithsonian Ctr. Astrophys.
)

et al.

- J.Low Temp.Phys. 199 (2020) 3-4, 976-984
•
e-Print:
- 2002.05228
•
DOI:
- 10.1007/s10909-020-02394-6

[14]

The Simons Observatory: Science goals and forecasts

Simons Observatory

Collaboration

•

Peter Ade
(
- Cardiff U.
)

et al.

- JCAP 02 (2019) 056
•
e-Print:
- 1808.07445
•
DOI:
- 10.1088/1475-7516/2019/02/056

[15]

Anti-reflection coated vacuum window for the Primordial Inflation Polarization ExploreR (PIPER) balloon-borne instrument

Rahul Datta
(
- Johns Hopkins U.
)
,
David T. Chuss
(
- Villanova U.
)
,
Joseph Eimer
(
- Johns Hopkins U.
)
,
Thomas Essinger-Hileman
(
- NASA, Goddard
)
,
Natalie N. Gandilo
(
- NASA, Goddard
)

et al.

- Rev.Sci.Instrum. 92 (2021) 3, 035111
•
e-Print:
- 2103.07936
•
DOI:
- 10.1063/5.0029430

The large scale polarization explorer (LSPE) for CMB measurements: performance forecast

LSPE

Collaboration

•

G. Addamo
(
- Polytech. Turin
)

et al.

- JCAP 08 (2021) 008,
- Journal of Cosmology and Astroparticle Physics, Volume 2021, August 2021
•
e-Print:
- 2008.11049
•
DOI:
- 10.1088/1475-7516/2021/08/008