Publication

Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments

de Lera Acedo, E., Trott, C. M., Wayth, R. B., Fagnoni, N., Bernardi, G., Wakley, B., Koopmans, L. V. E., Faulkner, A. J. & bij de Vaate, J. G., 1-Aug-2017, In : Monthly Notices of the Royal Astronomical Society. 469, 3, p. 2662-2671 10 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

de Lera Acedo, E., Trott, C. M., Wayth, R. B., Fagnoni, N., Bernardi, G., Wakley, B., ... bij de Vaate, J. G. (2017). Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments. Monthly Notices of the Royal Astronomical Society, 469(3), 2662-2671. https://doi.org/10.1093/mnras/stx904

Author

de Lera Acedo, Eloy ; Trott, Cathryn M. ; Wayth, Randall B. ; Fagnoni, Nicolas ; Bernardi, Gianni ; Wakley, Brett ; Koopmans, Léon V. E. ; Faulkner, Andrew J. ; bij de Vaate, Jan Geralt. / Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments. In: Monthly Notices of the Royal Astronomical Society. 2017 ; Vol. 469, No. 3. pp. 2662-2671.

Harvard

de Lera Acedo, E, Trott, CM, Wayth, RB, Fagnoni, N, Bernardi, G, Wakley, B, Koopmans, LVE, Faulkner, AJ & bij de Vaate, JG 2017, 'Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments', Monthly Notices of the Royal Astronomical Society, vol. 469, no. 3, pp. 2662-2671. https://doi.org/10.1093/mnras/stx904

Standard

Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments. / de Lera Acedo, Eloy; Trott, Cathryn M.; Wayth, Randall B.; Fagnoni, Nicolas; Bernardi, Gianni; Wakley, Brett; Koopmans, Léon V. E.; Faulkner, Andrew J.; bij de Vaate, Jan Geralt.

In: Monthly Notices of the Royal Astronomical Society, Vol. 469, No. 3, 01.08.2017, p. 2662-2671.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

de Lera Acedo E, Trott CM, Wayth RB, Fagnoni N, Bernardi G, Wakley B et al. Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments. Monthly Notices of the Royal Astronomical Society. 2017 Aug 1;469(3):2662-2671. https://doi.org/10.1093/mnras/stx904


BibTeX

@article{f45c1efbaea242708c28cec0fd049989,
title = "Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments",
abstract = "This paper is the first in a series of papers describing the impact of antenna instrumental artefacts on the 21 cm cosmology experiments to be carried out by the low frequency instrument (SKA1-LOW) of the Square Kilometre Array telescope (SKA), I.e. the Cosmic Dawn (CD) and the Epoch of Reionization (EoR). The smoothness of the passband response of the current log-periodic antenna being developed for the SKA1-LOW is analysed using numerical electromagnetic simulations. The amplitude variations over the frequency range are characterized using low-order polynomials defined locally, in order to study the impact of the passband smoothness in the instrument calibration and CD/EoR Science. A solution is offered to correct a fast ripple found at 60 MHz during a test campaign at the SKA site at the Murchison Radio-astronomy Observatory, Western Australia in 2015 September with a minor impact on the telescope's performance and design. A comparison with the Hydrogen Epoch of Reionization Array antenna is also shown demonstrating the potential use of the SKA1-LOW antenna for the delay-spectrum technique to detect the EoR.",
keywords = "instrumentation: detectors, dark ages, reionization, first stars, LIMITATIONS, WINDOWS, POWER SPECTRUM, REIONIZATION ARRAY, HYDROGEN EPOCH, POLARIZATION LEAKAGE, SCIENCE IMPLICATIONS, FOREGROUNDS, SIMULATIONS, CALIBRATION",
author = "{de Lera Acedo}, Eloy and Trott, {Cathryn M.} and Wayth, {Randall B.} and Nicolas Fagnoni and Gianni Bernardi and Brett Wakley and Koopmans, {L{\'e}on V. E.} and Faulkner, {Andrew J.} and {bij de Vaate}, {Jan Geralt}",
year = "2017",
month = "8",
day = "1",
doi = "10.1093/mnras/stx904",
language = "English",
volume = "469",
pages = "2662--2671",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

RIS

TY - JOUR

T1 - Spectral performance of SKA Log-periodic Antennas I: mitigating spectral artefacts in SKA1-LOW 21 cm cosmology experiments

AU - de Lera Acedo, Eloy

AU - Trott, Cathryn M.

AU - Wayth, Randall B.

AU - Fagnoni, Nicolas

AU - Bernardi, Gianni

AU - Wakley, Brett

AU - Koopmans, Léon V. E.

AU - Faulkner, Andrew J.

AU - bij de Vaate, Jan Geralt

PY - 2017/8/1

Y1 - 2017/8/1

N2 - This paper is the first in a series of papers describing the impact of antenna instrumental artefacts on the 21 cm cosmology experiments to be carried out by the low frequency instrument (SKA1-LOW) of the Square Kilometre Array telescope (SKA), I.e. the Cosmic Dawn (CD) and the Epoch of Reionization (EoR). The smoothness of the passband response of the current log-periodic antenna being developed for the SKA1-LOW is analysed using numerical electromagnetic simulations. The amplitude variations over the frequency range are characterized using low-order polynomials defined locally, in order to study the impact of the passband smoothness in the instrument calibration and CD/EoR Science. A solution is offered to correct a fast ripple found at 60 MHz during a test campaign at the SKA site at the Murchison Radio-astronomy Observatory, Western Australia in 2015 September with a minor impact on the telescope's performance and design. A comparison with the Hydrogen Epoch of Reionization Array antenna is also shown demonstrating the potential use of the SKA1-LOW antenna for the delay-spectrum technique to detect the EoR.

AB - This paper is the first in a series of papers describing the impact of antenna instrumental artefacts on the 21 cm cosmology experiments to be carried out by the low frequency instrument (SKA1-LOW) of the Square Kilometre Array telescope (SKA), I.e. the Cosmic Dawn (CD) and the Epoch of Reionization (EoR). The smoothness of the passband response of the current log-periodic antenna being developed for the SKA1-LOW is analysed using numerical electromagnetic simulations. The amplitude variations over the frequency range are characterized using low-order polynomials defined locally, in order to study the impact of the passband smoothness in the instrument calibration and CD/EoR Science. A solution is offered to correct a fast ripple found at 60 MHz during a test campaign at the SKA site at the Murchison Radio-astronomy Observatory, Western Australia in 2015 September with a minor impact on the telescope's performance and design. A comparison with the Hydrogen Epoch of Reionization Array antenna is also shown demonstrating the potential use of the SKA1-LOW antenna for the delay-spectrum technique to detect the EoR.

KW - instrumentation: detectors

KW - dark ages

KW - reionization

KW - first stars

KW - LIMITATIONS

KW - WINDOWS

KW - POWER SPECTRUM

KW - REIONIZATION ARRAY

KW - HYDROGEN EPOCH

KW - POLARIZATION LEAKAGE

KW - SCIENCE IMPLICATIONS

KW - FOREGROUNDS

KW - SIMULATIONS

KW - CALIBRATION

U2 - 10.1093/mnras/stx904

DO - 10.1093/mnras/stx904

M3 - Article

VL - 469

SP - 2662

EP - 2671

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -

ID: 52746318