618 citations · 5.7k across the 68 of their papers we have counts for
15 papers · 1 filter
The Annual Cycle in Scintillation Timescale of PMN J1726+0639
Hayley E. Bignall, Artem V. Tuntsov, Jamie Stevens +3
We discovered rapid intra-day variability in radio source PMN J1726+0639 at GHz frequencies, during a survey to search for such variability with the Australia Telescope Compact Arr…
Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
Wen-fai Fong, Yuxin Dong, Joel Leja +17
We present the Australian Square Kilometre Array Pathfinder (ASKAP) localization and follow-up observations of the host galaxy of the repeating fast radio burst (FRB) source, FRB20…
ASKAP observations of multiple rapid scintillators reveal a degrees-long plasma filament
Yuanming Wang, Artem Tuntsov, Tara Murphy +5
We present the results from an Australian Square Kilometre Array Pathfinder search for radio variables on timescales of hours. We conducted an untargeted search over a 30 deg f…
A High-Resolution View of Fast Radio Burst Host Environments
Alexandra G. Mannings, Wen-fai Fong, Sunil Simha +11
We present Hubble Space Telescope (HST/WFC3) ultraviolet and infrared observations of eight fast radio burst (FRB) host galaxies with sub-arcsecond localizations, including the hos…
Optical study of PKS B1322-110, the intra-hour variable radio source
Juan P. Madrid, Artem V. Tuntsov, Mischa Schirmer +7
Observations with the Australia Telescope Compact Array revealed intra-hour variations in the radio source PKS B1322-110 (Bignall et al. 2019). As part of an optical follow-up, we…
Dissecting the Local Environment of FRB 190608 in the Spiral Arm of its Host Galaxy
Jay S. Chittidi, Sunil Simha, Alexandra Mannings +15
We present a high-resolution analysis of the host galaxy of fast radio burst (FRB)~190608, an SB(r)c galaxy at (hereafter HG 190608), to dissect its local environment a…
Disentangling the Cosmic Web Towards FRB 190608
Sunil Simha, Joseph N. Burchett, J. Xavier Prochaska +12
FRB 190608 was detected by ASKAP and localized to a spiral galaxy at in the SDSS footprint. The burst has a large dispersion measure ( )…
Spica and the annual cycle of PKS B1322-110 scintillations
Hayley Bignall, Cormac Reynolds, Jamie Stevens +9
PKS B1322-110 is a radio quasar that is located only 8.5' in angular separation from the bright B star Spica. It exhibits intra-day variability in its flux density at GHz frequenci…
A pilot survey for transients and variables with the Australian Square Kilometre Array Pathfinder
S. Bhandari, K. W. Bannister, T. Murphy +20
We present a pilot search for variable and transient sources at 1.4 GHz with the Australian Square Kilometre Array Pathfinder (ASKAP). The search was performed in a 30 deg ar…
Extreme radio-wave scattering associated with hot stars
Mark Walker, Artem Tuntsov, Hayley Bignall +5
We use data on extreme radio scintillation to demonstrate that this phenomenon is associated with hot stars in the solar neighbourhood. The ionized gas responsible for the scatteri…
A search for long-timescale, low-frequency radio transients
Tara Murphy, David L. Kaplan, Steve Croft +30
We present a search for transient and highly variable sources at low radio frequencies (150-200 MHz) that explores long timescales of 1-3 years. We conducted this search by compari…
Real-time detection of an extreme scattering event: constraints on Galactic plasma lenses
Keith W. Bannister, Jamie Stevens, Artem V. Tuntsov +4
Extreme scattering events (ESEs) are distinctive fluctuations in the brightness of astronomical radio sources caused by occulting plasma lenses in the interstellar medium. The infe…
ASKAP HI imaging of the galaxy group IC 1459
P. Serra, B. Koribalski, V. Kilborn +76
We present HI imaging of the galaxy group IC 1459 carried out with six antennas of the Australian SKA Pathfinder equipped with phased-array feeds. We detect and resolve HI in eleve…
A Galactic Origin for the Fast Radio Burst FRB010621
Keith W. Bannister, Greg. J. Madsen
The recent detection of Fast Radio Bursts (FRBs) has generated strong interest in identifying the origin of these bright, non-repeating, highly dispersed pulses. The principal limi…
Optical Properties of High-Frequency Radio Sources from the Australia Telescope 20 GHz (AT20G) Survey
Elizabeth K. Mahony, Elaine M. Sadler, Scott M. Croom +7
Our current understanding of radio-loud AGN comes predominantly from studies at frequencies of 5 GHz and below. With the recent completion of the Australia Telescope 20 GHz (AT20G)…