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

4.3k citations

Showing 2020 · astro-ph.IMShow all

16 papers · 2 filters

astro-ph.IM2020★ 287 cited

The Rapid ASKAP Continuum Survey I: Design and First Results

D. McConnell, C. L. Hale, E. Lenc +46

The Rapid ASKAP Continuum Survey (RACS) is the first large-area survey to be conducted with the full 36-antenna Australian Square Kilometre Array Pathfinder (ASKAP) telescope. RACS…

astro-ph.IM2020★ 248 cited

The LOFAR Two Meter Sky Survey: Deep Fields, I -- Direction-dependent calibration and imaging

C. Tasse, T. Shimwell, M. J. Hardcastle +29

The Low Frequency Array (LOFAR) is an ideal instrument to conduct deep extragalactic surveys. It has a large field of view and is sensitive to large scale and compact emission. It…

astro-ph.IM2020★ 27 cited

Spectral index of the Galactic foreground emission in the 50-87 MHz range

Marta Spinelli, Gianni Bernardi, Hugh Garsden +4

Total-power radiometry with individual meter-wave antennas is a potentially effective way to study the Cosmic Dawn () through measurement of sky brightness arising from th…

astro-ph.IM2020★ 1 cited

Fast algorithms to approximate the position-dependent point spread function responses in radio interferometric wide-field imaging

M. Atemkeng, O. Smirnov, C. Tasse +2

The desire for wide-field of view, large fractional bandwidth, high sensitivity, high spectral and temporal resolution has driven radio interferometry to the point of big data revo…

astro-ph.IM2020★ 25 cited

Pulsars with NenuFAR: backend and pipelines

L. Bondonneau, J. -M. Grießmeier, G. Theureau +27

NenuFAR (New extension in Nançay upgrading LoFAR) is a new radio telescope developed and built on the site of the Nançay Radio Observatory. It is designed to observe the largely un…

astro-ph.IM2020★ 47 cited

Comparison of classical and Bayesian imaging in radio interferometry

Philipp Arras, Hertzog L. Bester, Richard A. Perley +4

CLEAN, the commonly employed imaging algorithm in radio interferometry, suffers from a number of shortcomings: in its basic version it does not have the concept of diffuse flux, an…

astro-ph.IM2020★ 178 cited

The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime

M. Bailes, A. Jameson, F. Abbate +72

We describe system verification tests and early science results from the pulsar processor (PTUSE) developed for the newly-commissioned 64-dish SARAO MeerKAT radio telescope in Sout…

astro-ph.IM2020★ 5 cited

A probabilistic approach to phase calibration: I. Effects of source structure on fringe-fitting

Iniyan Natarajan, Roger Deane, Ilse van Bemmel +6

We propose a probabilistic framework for performing simultaneous estimation of source structure and fringe-fitting parameters in Very Long Baseline Interferometry (VLBI) observatio…

astro-ph.IM2020★ 22 cited

Measuring HERA's primary beam in-situ: methodology and first results

Chuneeta D. Nunhokee, Aaron R. Parsons, Nicholas S. Kern +64

The central challenge in 21~cm cosmology is isolating the cosmological signal from bright foregrounds. Many separation techniques rely on the accurate knowledge of the sky and the…

astro-ph.IM2020★ 6 cited

SYMBA: An end-to-end VLBI synthetic data generation pipeline

F. Roelofs, M. Janssen, I. Natarajan +203

Realistic synthetic observations of theoretical source models are essential for our understanding of real observational data. In using synthetic data, one can verify the extent to…

astro-ph.IM2020★ 8 cited

Field sources near the southern-sky calibrator PKS B1934-638: effect on spectral line observations with SKA-MID and its precursors

I. Heywood, E. Lenc, P. Serra +8

Accurate instrumental bandpass corrections are essential for the reliable interpretation of spectral lines from targeted and survey-mode observations with radio interferometers. Ba…

astro-ph.IM2020★ 38 cited

Initial results from a realtime FRB search with the GBT

Devansh Agarwal, D. R. Lorimer, M. P. Surnis +11

We present the data analysis pipeline, commissioning observations and initial results from the GREENBURST fast radio burst (FRB) detection system on the Robert C. Byrd Green Bank T…

astro-ph.IM2020★ 21 cited

The Northern Cross Fast Radio Burst project. I. Overview and pilot observations at 408 MHz

Nicola T. Locatelli, Gianni Bernardi, Germano Bianchi +8

Fast radio bursts remain one of the most enigmatic astrophysical sources. Observations have significantly progressed over the last few years, thanks to the capabilities of new radi…

astro-ph.IM2020★ 1 cited

Filling the uv-gaps of the current VLBI network in Africa

Marcellin Atemkeng, Patrice M. Okouma, Eric Maina +2

In the African continent, South Africa has world-class astronomical facilities for advanced radio astronomy research. With the advent of the Square Kilometre Array project in South…

astro-ph.IM2020★ 57 cited

Redundant-Baseline Calibration of the Hydrogen Epoch of Reionization Array

Joshua S. Dillon, Max Lee, Zaki S. Ali +76

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 Epo…

astro-ph.IM2020

Imaging and Modeling Data from the Hydrogen Epoch of Reionization Array

C. L. Carilli{1, 2}, N. Thyagarajan{1} +43

We analyze data from the Hydrogen Epoch of Reionization Array. This is the third in a series of papers on the closure phase delay-spectrum technique designed to detect the HI 21cm…