Observing the Reionization : Effect of Calibration and Position Errors on Realistic Observation Conditions

Abstract

Observation of the redshifted 21-cm signal from Cosmic Dawn and Epoch of Reionization is a challenging endeavor in observational cosmology. Presence of orders of magnitude brighter astrophysical foregrounds and various instrumental systematics increases the complexity of these observations. This work presents an end-to-end pipeline dealing with synthetic interferometric data of sensitive radio observations . The mock sky model includes the redshifted 21-cm signal and astrophysical foregrounds. The effects of calibration error and position error in the extraction of the redshifted 21-cm power spectrum has been simulated. The effect of the errors in the image plane detection of the cosmological signal has also been studied. A comparative analysis for array configurations like the SKA1-Low, MWA and HERA has been demonstrated. The calibration error tolerance of the arrays, under some assumptions about the nature of the systematic components, is optimally found to be $\sim 0.01\%$ for the detection of the signal. For position errors, an offset of $\gtrapprox 5\arcsec$ makes the residual foregrounds obscure the target signal. These simulations also imply that in the SKA-1 Low performs marginally better than the others in the image domain, while the same is true for MWA in the power spectrum domain. This is one of the first studies that compares performance of various radio telescopes operating under similar observing conditions towards detecting the cosmological signal. This end-to-end pipeline can also be extended to study effects of chromatic primary beam, radio frequency inferences, foregrounds with spectral features, etc.

arXiv comment19 pages, 21 figures, Accepted for publication in MNRAS

References in corpus (87)

• Astropy: A Community Python Package for Astronomy
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• 21-cm cosmology
• Observational constraints on Cosmic Reionization
• 21-cm Tomography of the Intergalactic Medium at High Redshift
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• Hydrogen Epoch of Reionization Array (HERA)
• The LOFAR Two-metre Sky Survey - II. First data release
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
• Reionization and Cosmology with 21 cm Fluctuations
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• Ionospheric Calibration of Low Frequency Radio Interferometric Observations using the Peeling Scheme: I. Method Description and First Results
• Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
• The Reionization of the Universe by the First Stars and Quasars
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\mathbf{z}\approx 9.1$ from LOFAR
• Upper limits on the 21-cm Epoch of Reionization power spectrum from one night with LOFAR
• The Epoch of Reionization Window: I. Mathematical Formalism
• Foreground simulations for the LOFAR - Epoch of Reionization Experiment
• Distance measures in cosmology
• Toward Epoch of Reionization Measurements with Wide-Field Radio Observations
• The Phase II Murchison Widefield Array: Design Overview
• Data Analysis for Precision 21 cm Cosmology
• Imaging the Epoch of Reionization: limitations from foreground confusion and imaging algorithms
• Deep multi-redshift limits on Epoch of Reionisation 21cm Power Spectra from Four Seasons of Murchison Widefield Array Observations
• Comparison Of Reionization Models: Radiative Transfer Simulations And Approximate, Semi-Numeric Models
• The impact of point source subtraction residuals on 21 cm Epoch of Reionization estimation
• A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
• First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
• Calibration Requirements for Detecting the 21 cm Epoch of Reionization Power Spectrum and Implications for the SKA
• Inside-out or Outside-in: The topology of reionization in the photon-starved regime suggested by Lyman-alpha forest data
• The GMRT-EoR Experiment: A new upper limit on the neutral hydrogen power spectrum at z~8.6
• Foreground Contamination in Interferometric Measurements of the Redshifted 21 cm Power Spectrum
• A Method for 21cm Power Spectrum Estimation in the Presence of Foregrounds
• Opening the 21cm EoR Window: Measurements of Foreground Isolation with PAPER
• Design and characterization of the Large-Aperture Experiment to Detect the Dark Age (LEDA) radiometer systems
• First Season MWA EoR Power Spectrum Results at Redshift 7
• The Baryon Acoustic Oscillation Broadband and Broad-beam Array: Design Overview and Sensitivity Forecasts
• On using visibility correlations to probe the HI distribution from the dark ages to the present epoch I: Formalism and the expected signal
• The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation
• Probing the Dark Ages at Z~20: The SCI-HI 21 cm All-Sky Spectrum Experiment
• Foregrounds in Wide-Field Redshifted 21 cm Power Spectra
• 21cmFAST v3: A Python-integrated C code forgenerating 3D realizations of the cosmic 21cm signal
• BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
• Realistic Simulations of the Galactic Polarized Foreground: Consequences for 21-cm Reionization Detection Experiments
• The Tiered Radio Extragalactic Continuum Simulation (T-RECS)
• Precision Calibration of Radio Interferometers Using Redundant Baselines
• Improving Foreground Subtraction in Statistical Observations of 21 cm Emission from the Epoch of Reionization
• The redshifted 21-cm signal in the EDGES low-band spectrum
• Statistical 21-cm Signal Separation via Gaussian Process Regression Analysis
• The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
• The Impact of Modeling Errors on Interferometer Calibration for 21 cm Power Spectra
• The first power spectrum limit on the 21-cm signal of neutral hydrogen during the Cosmic Dawn at z=20-25 from LOFAR
• Fundamental Limitations on the Calibration of Redundant 21 cm Cosmology Instruments and Implications for HERA and the SKA
• Confirmation of Wide-Field Signatures in Redshifted 21 cm Power Spectra
• On the use of semi-numerical simulations in predicting the 21-cm signal from the epoch of reionization
• Characterisation of the ionosphere above the Murchison Radio Observatory using the Murchison Widefield Array
• Mitigating Internal Instrument Coupling for 21 cm Cosmology I: Temporal and Spectral Modeling in Simulations
• Calibration Challenges for Future Radio Telescopes
• A Fast Method for Power Spectrum and Foreground Analysis for 21 cm Cosmology
• Statistics of the epoch of reionization (EoR) 21-cm signal -- II. The evolution of the power spectrum error-covariance
• Spectral calibration requirements of radio interferometers for Epoch of Reionisation science with the SKA
• GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey II: Galactic Plane $345^{\circ }<l<67^{\circ }$, $180^{\circ }<l<240^{\circ }$
• Visibility based angular power spectrum estimation in low frequency radio interferometric observations
• Comparing Foreground Removal Techniques for Recovery of the LOFAR-EoR 21cm Power Spectrum
• Redundant-Baseline Calibration of the Hydrogen Epoch of Reionization Array
• Comparing Redundant and Sky Model Based Interferometric Calibration: A First Look with Phase II of the MWA
• The FHD/$\mathbf{\epsilon }$ppsilon Epoch of Reionization Power Spectrum Pipeline
• Absolute Calibration Strategies for the Hydrogen Epoch of Reionization Array and Their Impact on the 21 cm Power Spectrum
• The visibility based Tapered Gridded Estimator (TGE) for the redshifted 21-cm power spectrum
• Polarized Redundant-Baseline Calibration for 21 cm Cosmology Without Adding Spectral Structure
• The Bias and Uncertainty of Redundant and Sky-Based Calibration under Realistic Sky and Telescope Conditions
• Detailed study of ELAIS N1 field with the uGMRT -- II. Source Properties and Spectral Variation Of Foreground Power Spectrum from 300-500 MHz Observations
• A Unified Calibration Framework for 21 cm Cosmology
• Effects of the sources of reionization on 21-cm redshift-space distortions
• Detection of Signals from Cosmic Reionization using Radio Interferometric Signal Processing
• Precision requirements for interferometric gridding in 21-cm power spectrum analysis
• The angular power spectrum measurement of the Galactic synchrotron emission in two fields of the TGSS survey
• Spectral performance of SKA Log-periodic Antennas I: Mitigating spectral artefacts in SKA1-LOW 21-cm cosmology experiments
• Extracting the 21 cm EoR signal using MWA drift scan data
• Characterizing EoR foregrounds: A study of the Lockman Hole Region at 325 MHz
• Comparison of observing modes for statistical estimation of the 21cm signal from the Epoch of Reionisation
• Spectral performance of Square Kilometre Array Antennas II: Calibration performance
• Calibration Requirements for Epoch of Reionization 21-cm signal observations -- I. Effect of time-correlated gains

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• Interpreting the HI 21-cm cosmology maps through Largest Cluster Statistics -- I: Impact of the synthetic SKA1-Low observations
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