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Dissecting the interstellar medium of a z=6.3 galaxy: X-shooter spectroscopy and HST imaging of the afterglow and environment of the Swift GRB 210905A
A. Saccardi, S. D. Vergani, A. De Cia +35
The study of the properties of galaxies in the first billion years after the Big Bang is one of the major topic of current astrophysics. Optical/near-infrared spectroscopy of the a…
Rapid radio brightening of GRB 210702A
G. E. Anderson, T. D. Russell, H. M. Fausey +16
We observed the rapid radio brightening of GRB 210702A with the Australian Telescope Compact Array (ATCA) just 11hr post-burst, tracking early-time radio variability over a 5hr per…
Testing afterglow models of FRB 200428 with early post-burst observations of SGR 1935+2154
A. J. Cooper, A. Rowlinson, R. A. M. J. Wijers +8
We present LOFAR imaging observations from the April/May 2020 active episode of magnetar SGR 1935+2154. We place the earliest radio limits on persistent emission following the low-…
Evidence for an abundant old population of Galactic ultra long period magnetars and implications for fast radio bursts
P. Beniamini, Z. Wadiasingh, J. Hare +3
Two recent discoveries, namely PSR J0901-4046 and GLEAM-X J162759.5-523504.3 (hereafter GLEAM-X J1627), have corroborated an extant population of radio-loud periodic sources with l…
Transient Simulations for Radio Surveys
Sarah I Chastain, Alexander J van der Horst, Dario Carbone
Several new radio facilities have a field of view and sensitivity well suited for transient searches. This makes it more important than ever to accurately determine transient rates…
Wandering Black Hole Candidates in Dwarf Galaxies at VLBI Resolution
Andrew J. Sargent, Megan C. Johnson, Amy E. Reines +5
Thirteen dwarf galaxies have recently been found to host radio-selected accreting massive black hole (MBH) candidates, some of which are ``wandering" in the outskirts of their host…
Serendipitous discovery of radio flaring behaviour from a nearby M dwarf with MeerKAT
Alex Andersson, Rob Fender, Chris Lintott +12
We report on the detection of MKT J174641.0321404, a new radio transient found in untargeted searches of wide-field MeerKAT radio images centred on the black hole X-ray binary H…
Search and identification of transient and variable radio sources using MeerKAT observations: a case study on the MAXI J1820+070 field
A. Rowlinson, J. Meijn, J. Bright +11
Many transient and variable sources detected at multiple wavelengths are also observed to vary at radio frequencies. However, these samples are typically biased towards sources tha…
A blast from the infant Universe: the very high-z GRB 210905A
A. Rossi, D. D. Frederiks, D. A. Kann +52
We present a detailed follow-up of the very energetic GRB 210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. We obtained a photometric and spectr…