74 citations · 141 across the 17 of their papers we have counts for
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GRB 240205B: A Reverse Shock Detected in Rapid Response Radio Observations
S. I. Chastain, G. E. Anderson, A. J. van der Horst +6
Here we present broadband radio modeling of GRB 240205B, using observations with the Australia Telescope Compact Array (ATCA) and the South African MeerKAT radio telescope. Our obs…
First Results from the PanRadio Gamma-Ray Burst Collaboration: The 400-day Afterglow of GRB 230815A
James K. Leung, Gemma E. Anderson, Alexander J. van der Horst +26
We introduce the PanRadio Gamma-ray Burst (GRB) program carried out on the Australia Telescope Compact Array: a systematic, multi-year, radio survey of all southern $\textit{Swift}…
GRB 241105A: A test case for GRB classification and rapid r-process nucleosynthesis channels
Dimple, B. P. Gompertz, A. J. Levan +85
Gamma-ray bursts (GRBs) offer a powerful window to probe the progenitor systems responsible for the formation of heavy elements through the rapid neutron capture (r-) process, than…
Commensal Transient Searches with MeerKAT in Gamma-Ray Burst and Supernova Fields
S. I. Chastain, A. J. van der Horst, A. Horesh +6
The sensitivity and field of view of the MeerKAT radio telescope provides excellent opportunities for commensal transient searches. We carry out a commensal transient search in sup…
The early radio afterglow of short GRB 230217A
G. E. Anderson, G. Schroeder, A. J. van der Horst +9
We present the radio afterglow of short gamma-ray burst (GRB) 230217A, which was detected less than 1 day after the gamma-ray prompt emission with the Australia Telescope Compact A…
Constraints on Short Gamma-Ray Burst Physics and Their Host Galaxies from Systematic Radio Follow-up Campaigns
S. I. Chastain, A. J. van der Horst, G. E. Anderson +12
Short gamma-ray bursts (GRBs) are explosive transients caused by binary mergers of compact objects containing at least one neutron star. Multi-wavelength afterglow observations pro…
Commensal Transient Searches in Eight Short Gamma Ray Burst Fields
S. I. Chastain, A. J. van der Horst, A. Rowlinson +5
A new generation of radio telescopes with excellent sensitivity, instantaneous {\it uv} coverage, and large fields of view, are providing unprecedented opportunities for performing…
A Radio Flare in the Long-Lived Afterglow of the Distant Short GRB 210726A: Energy Injection or a Reverse Shock from Shell Collisions?
Genevieve Schroeder, Lauren Rhodes, Tanmoy Laskar +32
We present the discovery of the radio afterglow of the short -ray burst (GRB) 210726A, localized to a galaxy at a photometric redshift of . While radio observations c…
A new method for short duration transient detection in radio images: Searching for transient sources in MeerKAT data of NGC 5068
S. Fijma, A. Rowlinson, R. A. M. J. Wijers +12
Transient surveys are a vital tool in exploring the dynamic universe, with radio transients acting as beacons for explosive and highly energetic astrophysical phenomena. However, p…
The triple-peaked afterglow of GRB 210731A from X-ray to radio frequencies
S. de Wet, T. Laskar, P. J. Groot +18
GRB 210731A was a long-duration gamma-ray burst discovered by the Burst Alert Telescope (BAT) aboard the Neil Gehrels Swift observatory. Swift triggered the wide-field, robotic Mee…
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…
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…
Rapid Spectral Variability of a Giant Flare from a Magnetar in NGC 253
O. J. Roberts, P. Veres, M. G. Baring +18
Magnetars are slowly-rotating neutron stars with extremely strong magnetic fields ( G), episodically emitting ms long X-ray bursts with energies of $\sim10^{4…
Toward understanding the physical underpinnings of spatial and spectral morphologies of pulsar wind nebulae
Oleg Kargaltsev, Noel Klingler, Sarah Chastain +1
We discuss the observational properties of pulsar wind nebulae (PWNe) linking them to the injected (at the termination shock) electron spectral energy distribution and parameters o…