Browsing Physics and Astronomy by Author "La Plante, P"
Now showing items 1-14 of 14
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Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum
Kern, NS; Dillon, JS; Parsons, AR; Carilli, CL; Bernardi, G; Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS; Balfour, Y (American Astronomical Society, 2020-02-20)We discuss absolute calibration strategies for Phase I of the Hydrogen Epoch of Reionization Array (HERA), which aims to measure the cosmological 21 cm signal from the Epoch of Reionization. HERA is a drift-scan array with ... -
Automated Detection of Antenna Malfunctions in Large-N Interferometers: A case study With the Hydrogen Epoch of Reionization Array
Storer, D; Dillon, JS; Jacobs, DC; Morales, MF; Hazelton, BJ; Ewall-Wice, A; Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS (2022) -
DAYENU: a simple filter of smooth foregrounds for intensity mapping power spectra
Ewall-Wice, A; Kern, N; Dillon, JS; Liu, A; Parsons, A; Singh, S; Lanman, A; La Plante, P; Fagnoni, N; Acedo, EDL (Oxford University Press, 2020-10)We introduce DPSS Approximate lazY filtEriNg of foregroUnds (DAYENU), a linear, spectral filter for H I intensity mapping that achieves the desirable foreground mitigation and error minimization properties of inverse ... -
Effects of model incompleteness on the drift-scan calibration of radio telescopes
Gehlot, BK; Jacobs, DC; Bowman, JD; Mahesh, N; Murray, SG; Kolopanis, M; Beardsley, AP; Abdurashidova, Z; Aguirre, JE; Alexander, P (2021) -
First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS; Balfour, Y; Beardsley, AP; Bernardi, G; Billings, TS; Bowman, JD; Bradley, RF (2022) -
HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization
Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS; Balfour, Y; Barkana, R; Beardsley, AP; Bernardi, G; Billings, TS; Bowman, JD (2022) -
The HERA-19 Commissioning Array: Direction-dependent Effects
Kohn, SA; Aguirre, JE; La Plante, P; Billings, TS; Chichura, PM; Fortino, AF; Igarashi, AS; Benefo, RK; Gallardo, S; Martinot, ZE (American Astronomical Society, 2019-09-01)Foreground power dominates the measurements of interferometers that seek a statistical detection of highly-redshifted H i emission from the Epoch of Reionization (EoR). The chromaticity of the instrument creates a boundary ... -
Imaging and Modeling Data from the Hydrogen Epoch of Reionization Array
Carilli, CL; Thyagarajan, N; Kent, J; Nikolic, B; Gale-Sides, K; Kern, NS; Bernardi, G; Mesinger, A; Matika, S; Abdurashidova, Z (IOP Publishing, 2020-04)We analyze data from the Hydrogen Epoch of Reionization Array (HERA). This is the third in a series of papers on the closure phase delay spectrum technique designed to detect the H i 21 cm emission from cosmic reionization. ... -
Methods of Error Estimation for Delay Power Spectra in 21 cm Cosmology
Tan, J; Liu, A; Kern, NS; Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS; Balfour, Y; Beardsley, AP; Bernardi, G (2021-08) -
Mitigating Internal Instrument Coupling for 21 cm Cosmology. II. A Method Demonstration with the Hydrogen Epoch of Reionization Array
Kern, NS; Parsons, AR; Dillon, JS; Lanman, AE; Liu, A; Bull, P; Ewall-Wice, A; Abdurashidova, Z; Aguirre, JE; Alexander, P (The American Astronomical Society, 2020-01-10)We present a study of internal reflection and cross-coupling systematics in Phase I of the Hydrogen Epoch of Reionization Array (HERA). In a companion paper, we outlined the mathematical formalism for such systematics and ... -
A Real Time Processing system for big data in astronomy: Applications to HERA
La Plante, P; Williams, PKG; Kolopanis, M; Dillon, JS; Beardsley, AP; Kern, NS; Wilensky, M; Ali, ZS; Abdurashidova, Z; Aguirre, JE (2021) -
Redundant-baseline calibration of the hydrogen epoch of reionization array
Dillon, JS; Lee, M; Ali, ZS; Parsons, AR; Orosz, N; Nunhokee, CD; La Plante, P; Beardsley, AP; Kern, NS; Abdurashidova, Z (Oxford University Press, 2020-10)In 21-cm cosmology, precision calibration is key to the separation of the neutral hydrogen signal from very bright but spectrally smooth astrophysical foregrounds. The Hydrogen Epoch of Reionization Array (HERA), an ... -
Understanding the HERA Phase I receiver system with simulations and its impact on the detectability of the EoR delay power spectrum
Fagnoni, N; Acedo, EDL; DeBoer, DR; Abdurashidova, Z; Aguirre, JE; Alexander, P; Ali, ZS; Balfour, Y; Beardsley, AP; Bernardi, G (Oxford University Press, 2020-10)The detection of the Epoch of Reionization (EoR) delay power spectrum using a ‘foreground avoidance method’ highly depends on the instrument chromaticity. The systematic effects induced by the radio telescope spread the ... -
Validation of the HERA Phase I Epoch of Reionization 21 cm Power Spectrum Software Pipeline
Aguirre, JE; Murray, SG; Pascua, R; Martinot, ZE; Burba, J; Dillon, JS; Jacobs, DC; Kern, NS; Kittiwisit, P; Kolopanis, M (2022)