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Quantifying Uncertainty in Deep Learning Approaches to Radio Galaxy Classification

ArXiv 2201.01203 (2022)

Authors:

Devina Mohan, Anna MM Scaife, Fiona Porter, Mike Walmsley, Micah Bowles
Details from ArXiV

Lensing from small-scale travelling ionospheric disturbances observed using LOFAR

Journal of Space Weather and Space Climate EDP Sciences 12 (2022) 34-34

Authors:

Ben Boyde, Alan Wood, Gareth Dorrian, Richard A Fallows, David Themens, Jens Mielich, Sean Elvidge, Maaijke Mevius, Pietro Zucca, Bartosz Dabrowski, Andrzej Krankowski, Christian Vocks, Mario Bisi

Abstract:

Observations made using the LOw-Frequency ARray (LOFAR) between 10:15 and 11:48 UT on the 15th of September 2018 over a bandwidth of approximately 25–65 MHz contain discrete pseudo-periodic features of ionospheric origin. These features occur within a period of approximately 10 min and collectively last roughly an hour. They are strongly frequency dependent, broadening significantly in time towards the lower frequencies, and show an overlaid pattern of diffraction fringes. By modelling the ionosphere as a thin phase screen containing a wave-like disturbance, we are able to replicate the observations, suggesting that they are associated with small-scale travelling ionospheric disturbances (TIDs). This modelling indicates that the features observed here require a compact radio source at a low elevation and that the TID or TIDs in question have a wavelength <~30 km. Several features suggest the presence of deviations from an idealised sinusoidal wave form. These results demonstrate LOFAR’s capability to identify and characterise small-scale ionospheric structures.
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E(2) Equivariant Self-Attention for Radio Astronomy

ArXiv 2111.04742 (2021)

Authors:

Micah Bowles, Matthew Bromley, Max Allen, Anna Scaife
Details from ArXiV

Radio and X-ray observations of the luminous Fast Blue Optical Transient AT2020xnd

ArXiv 2110.05514 (2021)

Authors:

Joe S Bright, Raffaella Margutti, David Matthews, Daniel Brethauer, Deanne Coppejans, Mark H Wieringa, Brian D Metzger, Lindsay DeMarchi, Tanmoy Laskar, Charles Romero, Kate D Alexander, Assaf Horesh, Giulia Migliori, Ryan Chornock, E Berger, Michael Bietenholz, Mark J Devlin, Simon R Dicker, WV Jacobson-Galán, Brian S Mason, Dan Milisavljevic, Sara E Motta, Tony Mroczkowski, Enrico Ramirez-Ruiz, Lauren Rhodes, Craig L Sarazin, Itai Sfaradi, Jonathan Sievers
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Magnetic anomaly coefficients for QCD axion couplings

ArXiv 2109.08503 (2021)

Authors:

Anton V Sokolov, Andreas Ringwald
Details from ArXiV