The FHD/$\mathbf{\epsilon }$ppsilon Epoch of Reionization Power Spectrum Pipeline

Abstract

Epoch of Reionization data analysis requires unprecedented levels of accuracy in radio interferometer pipelines. We have developed an imaging power spectrum analysis to meet these requirements and generate robust 21 cm EoR measurements. In this work, we build a signal path framework to mathematically describe each step in the analysis, from data reduction in the FHD package to power spectrum generation in the $\epsilon$ppsilon package. In particular, we focus on the distinguishing characteristics of FHD/$\epsilon$ppsilon: highly accurate spectral calibration, extensive data verification products, and end-to-end error propagation. We present our key data analysis products in detail to facilitate understanding of the prominent systematics in image-based power spectrum analyses. As a verification to our analysis, we also highlight a full-pipeline analysis simulation to demonstrate signal preservation and lack of signal loss. This careful treatment ensures that the FHD/$\epsilon$ppsilon power spectrum pipeline can reduce radio interferometric data to produce credible 21 cm EoR measurements.

21 pages, 10 figures, accepted by PASA

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Cited by in corpus (32)

• Deep multi-redshift limits on Epoch of Reionisation 21cm Power Spectra from Four Seasons of Murchison Widefield Array Observations
• First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
• Improving the Epoch of Reionization Power Spectrum Results from Murchison Widefield Array Season 1 Observations
• First Season MWA Phase II EoR Power Spectrum Results at Redshift 7
• Gaussian Process Foreground Subtraction and Power Spectrum Estimation for 21 cm Cosmology
• DAYENU: A Simple Filter of Smooth Foregrounds for Intensity Mapping Power Spectra
• Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum
• A Unified Calibration Framework for 21 cm Cosmology
• Calibration and 21-cm Power Spectrum Estimation in the Presence of Antenna Beam Variations
• Quantifying Excess Power from Radio Frequency Interference in Epoch of Reionization Measurements
• New EoR Power Spectrum Limits From MWA Phase II Using the Delay Spectrum Method and Novel Systematic Rejection
• Validation of the HERA Phase I Epoch of Reionization 21 cm Power Spectrum Software Pipeline
• A Map of Diffuse Radio Emission at 182 MHz to Enhance Epoch of Reionization Observations in the Southern Hemisphere
• Evidence of Ultra-faint Radio Frequency Interference in Deep 21~cm Epoch of Reionization Power Spectra with the Murchison Widefield Array
• Observing the Reionization : Effect of Calibration and Position Errors on Realistic Observation Conditions
• Exploring the cosmic dawn and epoch of reionization with 21cm line
• 21cmSense v2: A modular, open-source 21cm sensitivity calculator
• Dual Polarization Measurements of MWA Beampatterns at 137 MHz
• A Bayesian approach to high fidelity interferometric calibration II: demonstration with simulated data
• The Role of the Instrumental Response in 21 cm EoR Power Spectrum Gridding Analyses
• Characterization Of Inpaint Residuals In Interferometric Measurements of the Epoch Of Reionization
• The Impact of Tandem Redundant/Sky-Based Calibration in MWA Phase II Data Analysis
• Direct Optimal Mapping for 21cm Cosmology: A Demonstration with the Hydrogen Epoch of Reionization Array
• Multi-frequency angular power spectrum of the 21~cm signal from the Epoch of Reionisation using the Murchison Widefield Array
• Delay-Weighted Calibration: Precision Calibration for 21 cm Cosmology with Resilience to Sky Model Error
• Why and When to Expect Gaussian Error Distributions in Epoch of Reionization 21-cm Power Spectrum Measurements
• A Differentiable, End-to-End Forward Model for 21 cm Cosmology: Estimating the Foreground, Instrument, and Signal Joint Posterior
• Aliasing from Galactic Plane Setting in Widefield Radio Interferometry
• Understanding spectral artefacts in SKA-LOW 21-cm cosmology experiments: the impact of cable reflections
• Probing the Epoch of Reionization using synergies of line intensity mapping
• The impact of lunar topography on the 21-cm power spectrum for grid-based arrays : Insights for the Dark-ages EXplorer (DEX)
• Bayes-SCF: A Bayesian filter to mitigate foreground leakage in the 21-cm power spectrum