Characterization of inpaint residuals in interferometric measurements of the epoch of reionization

dc.contributor.authorBull, Philip
dc.contributor.authorPagano, Michael
dc.contributor.authorLiu, Jing
dc.contributor.authorLiu, Adrian
dc.date.accessioned2023-06-05T08:11:53Z
dc.date.available2023-06-05T08:11:53Z
dc.date.issued2023
dc.description.abstractTo mitigate the effects of Radio Frequency Interference (RFI) on the data analysis pipelines of 21 cm interferometric instruments, numerous inpaint techniques have been developed. In this paper, we examine the qualitative and quantitative errors introduced into the visibilities and power spectrum due to inpainting. We perform our analysis on simulated data as well as real data from the Hydrogen Epoch of Reionization Array (HERA) Phase 1 upper limits. We also introduce a convolutional neural network that is capable of inpainting RFI corrupted data. We train our network on simulated data and show that our network is capable of inpainting real data without requiring to be retrained. We find that techniques that incorporate high wavenumbers in delay space in their modelling are best suited for inpainting over narrowband RFI. We show that with our fiducial parameters discrete prolate spheroidal sequences (DPSS) and CLEAN provide the best performance for intermittent RFI while Gaussian progress regression (GPR) and least squares spectral analysis (LSSA) provide the best performance for larger RFI gaps.en_US
dc.identifier.citationPagano, M., Liu, J., Liu, A., Kern, N.S., Ewall-Wice, A., Bull, P., Pascua, R., Ravanbakhsh, S., Abdurashidova, Z., Adams, T. and Aguirre, J.E., 2023. Characterization of inpaint residuals in interferometric measurements of the epoch of reionization. Monthly Notices of the Royal Astronomical Society, 520(4), pp.5552-5572.en_US
dc.identifier.urihttps://doi.org/10.1093/mnras/stad441
dc.identifier.urihttp://hdl.handle.net/10566/9006
dc.language.isoenen_US
dc.publisherMonthly Notices of the Royal Astronomical Societyen_US
dc.subjectDark agesen_US
dc.subjectFirst starsen_US
dc.subjectLarge-scale structure of Universeen_US
dc.subjectObservationalen_US
dc.subjectStatisticalen_US
dc.titleCharacterization of inpaint residuals in interferometric measurements of the epoch of reionizationen_US
dc.typeArticleen_US

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