output
19992026
most citedFirst M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

4.3k citations

Showing 2021 · astro-ph.IMShow all

12 papers · 2 filters

astro-ph.IM2021

The Correlation Calibration of PAPER-64 data

Tamirat G. Gogo, Yin-Zhe Ma, Piyanat Kittiwisit +21

Observation of redshifted 21-cm signal from the Epoch of Reionization (EoR) is challenging due to contamination from the bright foreground sources that exceed the signal by several…

astro-ph.IM2021★ 1 cited

Apertif, Phased Array Feeds for the Westerbork Synthesis Radio Telescope

W. A. van Cappellen, T. A. Oosterloo, M. A. W. Verheijen +87

We describe the APERture Tile In Focus (Apertif) system, a phased array feed (PAF) upgrade of the Westerbork Synthesis Radio Telescope which has transformed this telescope into a h…

astro-ph.IM2021★ 3 cited

The Hydrogen Intensity and Real-time Analysis eXperiment: 256-Element Array Status and Overview

Devin Crichton, Moumita Aich, Adam Amara +97

The Hydrogen Intensity and Real-time Analysis eXperiment (HIRAX) is a radio interferometer array currently in development, with an initial 256-element array to be deployed at the S…

astro-ph.IM2021★ 5 cited

Automated Detection of Antenna Malfunctions in Large-N Interferometers: A Case Study with the Hydrogen Epoch of Reionization Array

Dara Storer, Joshua S. Dillon, Daniel C. Jacobs +75

We present a framework for identifying and flagging malfunctioning antennas in large radio interferometers. We outline two distinct categories of metrics designed to detect outlier…

astro-ph.IM2021★ 88 cited

Sub-arcsecond imaging with the International LOFAR Telescope I. Foundational calibration strategy and pipeline

L. K. Morabito, N. J. Jackson, S. Mooney +71

[abridged] The International LOFAR Telescope is an interferometer with stations spread across Europe. With baselines of up to ~2,000 km, LOFAR has the unique capability of achievin…

astro-ph.IM2021★ 32 cited

The BINGO Project II: Instrument Description

Carlos A. Wuensche, Thyrso Villela, Elcio Abdalla +41

The measurement of diffuse 21-cm radiation from the hyperfine transition of neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However,…

astro-ph.IM2021★ 27 cited

Validation of the HERA Phase I Epoch of Reionization 21 cm Power Spectrum Software Pipeline

James E. Aguirre, Steven G. Murray, Robert Pascua +73

We describe the validation of the HERA Phase I software pipeline by a series of modular tests, building up to an end-to-end simulation. The philosophy of this approach is to valida…

astro-ph.IM2021

A Real Time Processing System for Big Data in Astronomy: Applications to HERA

Paul La Plante, Peter K. G. Williams, Matthew Kolopanis +72

As current- and next-generation astronomical instruments come online, they will generate an unprecedented deluge of data. Analyzing these data in real time presents unique conceptu…

astro-ph.IM2021★ 18 cited

Methods of Error Estimation for Delay Power Spectra in Cosmology

Jianrong Tan, Adrian Liu, Nicholas S. Kern +71

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-freque…

astro-ph.IM2021★ 100 cited

The LOFAR LBA Sky Survey I. survey description and preliminary data release

F. de Gasperin, W. L. Williams, P. Best +38

LOFAR is the only radio telescope that is presently capable of high-sensitivity, high-resolution (<1 mJy/b and <15") observations at ultra-low frequencies (<100 MHz). To utilise th…

astro-ph.IM2021★ 293 cited

Australian Square Kilometre Array Pathfinder: I. System Description

A. W. Hotan, J. D. Bunton, A. P. Chippendale +63

In this paper we describe the system design and capabilities of the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope at the conclusion of its construction proje…

astro-ph.IM2021★ 17 cited

Cygnus A jointly calibrated and imaged via non-convex optimisation from VLA data

Arwa Dabbech, Audrey Repetti, Rick A. Perley +2

Radio interferometric (RI) data are noisy under-sampled spatial Fourier components of the unknown radio sky affected by direction-dependent antenna gains. Failure to model these an…