MeerKAT observations of Herschel protocluster candidates

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 535:1 (2024) 370-391

Authors:

Y Ding, DL Clements, LL Leeuw, I Heywood, H Dannerbauer, A Parmar, P Legodi, RJ Ivison, R Blake, CM Gutiérrez, A Carnero, W Sutherland

MeerKAT Observations of Procyon at 815.5 MHz

Research Notes of the American Astronomical Society American Astronomical Society 8:10 (2024) 255

Authors:

Ian Heywood, Andrew PV Siemion, Daniel Czech, Steve Ertel, Jamie Drew, Kyran Grattan, Kevin Wagner, S Pete Worden

Abstract:

We have conducted observations of the nearby (11.46 ly) star system Procyon, using MeerKAT’s UHF (544–1087 MHz) receivers. We produce full-Stokes time and frequency integrated continuum images, as well as total intensity time series imaging at 8 s cadence, and full-Stokes vector-averaged dynamic spectra from the visibilities in order to search for transient activity such as flaring events. We detect no significant radio emission from the system, and estimate an upper limit on the circular polarization fraction of 65% (3σ confidence level). A comparison with previous Very Large Array observations places a 3σ lower limit on the spectral index between 815.5 and 8400 MHz of 0.26, however long-term significant variability over the last 33 yr cannot be ruled out without further, regular radio monitoring of the system.

Finding radio transients with anomaly detection and active learning based on volunteer classifications

(2024)

Authors:

Alex Andersson, Chris Lintott, Rob Fender, Michelle Lochner, Patrick Woudt, Jakob van den Eijnden, Alexander van der Horst, Assaf Horesh, Payaswini Saikia, Gregory R Sivakoff, Lilia Tremou, Mattia Vaccari

The Radio Counterpart to the Fast X-ray Transient EP240414a

(2024)

Authors:

Joe S Bright, Francesco Carotenuto, Rob Fender, Carmen Choza, Andrew Mummery, Peter G Jonker, Stephen J Smartt, David R DeBoer, Wael Farah, James Matthews, Alexander W Pollak, Lauren Rhodes, Andrew Siemion

On the implausible physical implications of a claimed lensed neutral hydrogen detection at redshift z = 1.3

Monthly Notices of the Royal Astronomical Society: Letters Oxford University Press (OUP) 535:1 (2024) l70-l75

Authors:

Roger P Deane, Tariq Blecher, Danail Obreschkow, Ian Heywood