Methods of Error Estimation for Delay Power Spectra in 21 cm Cosmology

@article{Tan2021MethodsOE,
  title={Methods of Error Estimation for Delay Power Spectra in 21 cm Cosmology},
  author={Jianrong Tan and Adrian Liu and Nicholas S. Kern and Zara Abdurashidova and James E. Aguirre and Paul Alexander and Zaki S. Ali and Yanga Balfour and Adam P. Beardsley and Gianni Bernardi and Tashalee S. Billings and Judd D. Bowman and Richard F. Bradley and Philip Bull and Jacob Burba and Steve H. Carey and Christopher L. Carilli and Carina Cheng and David R. DeBoer and Matt Dexter and Eloy de Lera Acedo and Joshua S. Dillon and J. A. Ely and Aaron Ewall-Wice and Nicolas Fagnoni and Randall Fritz and Steven R. Furlanetto and Kingsley Gale-Sides and B. E. Glendenning and Deepthi Gorthi and Bradley Greig and Jasper Grobbelaar and Ziyaad Halday and Bryna J. Hazelton and Jacqueline N. Hewitt and Jack Hickish and Daniel C. Jacobs and Austin Julius and Joshua Kerrigan and Piyanat Kittiwisit and Saul A. Kohn and Matthew Kolopanis and Adam E. Lanman and Paul La Plante and Telalo Lekalake and David Macmahon and Lourence Malan and Cresshim Malgas and M. D. J. Maree and Zachary E. Martinot and Eunice Matsetela and Andrei Mesinger and Mathakane Molewa and Miguel F. Morales and Tshegofalang Mosiane and S. Murray and Abraham R. Neben and Bojan Nikoli{\'c} and Chuneeta D. Nunhokee and Aaron Parsons and Nipanjana Patra and Samantha Pieterse and Jonathan C. Pober and Nima Razavi-Ghods and Jon Ringuette and James Robnett and Kathryn Rosie and Peter H Sims and Saurabh Singh and Craig H. Smith and Angelo Syce and Nithyanandan Thyagarajan and Peter K. G. Williams and Haoxuan Zheng},
  journal={The Astrophysical Journal Supplement Series},
  year={2021},
  volume={255}
}
Precise measurements of the 21 cm power spectrum are crucial for understanding the physical processes of hydrogen reionization. Currently, this probe is being pursued by low-frequency radio interferometer arrays. As these experiments come closer to making a first detection of the signal, error estimation will play an increasingly important role in setting robust measurements. Using the delay power spectrum approach, we have produced a critical examination of different ways that one can estimate… 
First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
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TLDR
The validation test suite uncovered several sources of scale-independent signal loss throughout the HERA Phase I software pipeline, whose amplitude is well-characterized and accounted for in the final estimates.
HERA Phase I Limits on the Cosmic 21 cm Signal: Constraints on Astrophysics and Cosmology during the Epoch of Reionization
Recently, the Hydrogen Epoch of Reionization Array (HERA) has produced the experiment’s first upper limits on the power spectrum of 21 cm fluctuations at z ∼ 8 and 10. Here, we use several
SKA-low intensity mapping pathfinder updates: deeper 21 cm power spectrum limits from improved analysis frameworks
Abstract. The Square Kilometer Array (SKA) is a planned radio interferometer of unprecedented scale that will revolutionize low-frequency radio astronomy when completed. In particular, one of its

References

SHOWING 1-10 OF 89 REFERENCES
Patterns of primary beam non-redundancy in close-packed 21 cm array observations
Radio interferometer arrays such as HERA consist of many close-packed dishes arranged in a regular pattern, giving rise to a large number of ‘redundant’ baselines with the same length and
Redundant-baseline calibration of the hydrogen epoch of reionization array
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
Constraining the intergalactic medium at z ≈ 9.1 using LOFAR Epoch of Reionization observations
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope
Deep multiredshift limits on Epoch of Reionization 21 cm power spectra from four seasons of Murchison Widefield Array observations
Abstract We compute the spherically averaged power spectrum from four seasons of data obtained for the Epoch of Reionization (EoR) project observed with the Murchison Widefield Array (MWA). We
Improved upper limits on the 21 cm signal power spectrum of neutral hydrogen at z ≈ 9.1 from LOFAR
A new upper limit on the 21 cm signal power spectrum at a redshift of z ≈ 9.1 is presented, based on 141 h of data obtained with the Low-Frequency Array (LOFAR). The analysis includes significant
First Season MWA Phase II Epoch of Reionization Power Spectrum Results at Redshift 7
The compact configuration of Phase II of the Murchison Widefield Array (MWA) consists of both a redundant subarray and pseudo-random baselines, offering unique opportunities to perform sky-model and
Improving the Epoch of Reionization Power Spectrum Results from Murchison Widefield Array Season 1 Observations
Measurements of 21 cm Epoch of Reionization (EoR) structure are subject to systematics originating from both the analysis and the observation conditions. Using 2013 data from the Murchison Widefield
Testing for calibration systematics in the EDGES low-band data using Bayesian model selection
  • P. Sims, J. Pober
  • Physics
    Monthly Notices of the Royal Astronomical Society
  • 2019
Cosmic Dawn (CD), when the first stars and proto-galaxies began to form, is commonly expected to be accompanied by an absorption signature at radio frequencies. This feature arises as Lyman α
Mitigating Internal Instrument Coupling for 21 cm Cosmology. I. Temporal and Spectral Modeling in Simulations
We study the behavior of internal signal chain reflections and antenna cross coupling as systematics for 21 cm cosmological surveys. We outline the mathematics for how these systematics appear in
A Simplified, Lossless Reanalysis of PAPER-64
We present limits on the 21cm power spectrum from the Epoch of Reionization (EoR) using data from the 64 antenna configuration of the Donald C. Backer Precision Array for Probing the Epoch of
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