Breakthrough Listen

Research group

Research theme

Sub department

About

Serendipitous discovery of radio flaring behaviour from a nearby M dwarf with MeerKAT

(2022)

Authors:

Alex Andersson, Rob Fender, Chris Lintott, David Williams, Laura Driessen, Patrick Woudt, Alexander van der Horst, David Buckley, Sara Motta, Lauren Rhodes, Nora Eisner, Rachel Osten, Paul Vreeswijk, Steven Bloemen, Paul Groot
More details from the publisher
Details from ArXiV

Search and identification of transient and variable radio sources using MeerKAT observations: a case study on the MAXI J1820+070 field

(2022)

Authors:

A Rowlinson, J Meijn, J Bright, AJ van der Horst, S Chastain, S Fijma, R Fender, I Heywood, RAMJ Wijers, PA Woudt, A Andersson, GR Sivakoff, E Tremou, LN Driessen
More details from the publisher
Details from ArXiV

Quantifying uncertainty in deep learning approaches to radio galaxy classification

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 511:3 (2022) 3722-3740

Authors:

Devina Mohan, Anna MM Scaife, Fiona Porter, Mike Walmsley, Micah Bowles
More details from the publisher
More details

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.
More details from the publisher