Publications (28)
Numerical simulations on the relative importance of starbursts and AGN in ultra-luminous infrared galaxies
Kenji Bekki, Yashuhiro Shioya, Matthew Whiting
We investigate the relative importance of starbursts and AGN in nuclear activities of ultra-luminous infrared galaxies (ULIRGs) based on chemodynamical simulations combined with sp…
The Optical Emission from Gamma-ray Quasars
Matthew Whiting, Petra Majewski, Rachel Webster
We present photometric observations of six radio-loud quasars that were detected by the COMPTEL gamma-ray telescope. The data encompasses seven wavebands in the optical and near-in…
Deep Investigation of Neutral Gas Origins (DINGO): HI stacking experiments with early science data
Jonghwan Rhee, Martin Meyer, Attila Popping +19
We present early science results from Deep Investigation of Neutral Gas Origins (DINGO), an HI survey using the Australian Square Kilometre Array Pathfinder (ASKAP). Using ASKAP su…
Unexpected Circular Radio Objects at High Galactic Latitude
Ray P. Norris, Huib T. Intema, Anna D. Kapinska +26
We have found a class of circular radio objects in the Evolutionary Map of the Universe Pilot Survey, using the Australian Square Kilometre Array Pathfinder telescope. The objects…
An HI absorption distance to the black hole candidate X-ray binary MAXI J1535-571
Jaiverdhan Chauhan, James C. A. Miller-Jones, Gemma E. Anderson +10
With the Australian Square Kilometre Array Pathfinder (ASKAP) we monitored the black hole candidate X-ray binary MAXI J1535--571 over seven epochs from 21 September to 2 October 20…
DINGO/GAMA /WAVES: HI-halo mass relation
Ajay Dev, Martin Meyer, Simon P. Driver +17
We investigate the relation between neutral atomic hydrogen (HI) and dark matter halo mass (HIHM) using observations from the Deep Investigation of Neutral Gas Origins (DINGO) pilo…
Deep Investigation of Neutral Gas Origins (DINGO): Options for robust Deep Spectral Line Imaging in the SKA-Era
Jonghwan Rhee, Richard Dodson, Alexander Williamson +6
The data storage requirements for deep spectral line observations with next-generation radio interferometers like the Australian Square Kilometre Array Pathfinder (ASKAP) and the S…
The ASKAP Variables and Slow Transients (VAST) Pilot Survey
Tara Murphy, David L. Kaplan, Adam J. Stewart +52
The Variables and Slow Transients Survey (VAST) on the Australian Square Kilometre Array Pathfinder (ASKAP) is designed to detect highly variable and transient radio sources on tim…
The detection of an extremely bright fast radio burst in a phased array feed survey
Keith Bannister, Ryan Shannon, Jean-Pierre Macquart +53
We report the detection of an ultra-bright fast radio burst (FRB) from a modest, 3.4-day pilot survey with the Australian Square Kilometre Array Pathfinder. The survey was conducte…
The FLASH pilot survey: an HI absorption search against MRC 1-Jy radio sources
J. N. H. S. Aditya, Hyein Yoon, James R. Allison +16
We report an ASKAP search for associated HI 21-cm absorption against bright radio sources from the Molonglo Reference Catalogue (MRC) 1-Jy sample. The search uses pilot survey data…
A FLASH HI absorption search in compact sources in the pilot ASKAP interplanetary scintillation field
Paris E. Gordon-Hall, Emily F. Kerrison, Elizabeth K. Mahony +13
The study uses ASKAP interplanetary scintillation measurements to identify compact radio sources and searches for redshifted HI 21 cm absorption between z = 0.4–1, detecting two ne…
VLBI studies of FLASH H I 21-cm absorbers -- I
J. N. H. S. Aditya, Elaine M. Sadler, Raffaella Morganti +9
We have conducted VLBA 1.4 GHz (L-band) continuum observations towards twelve sources with HI 21-cm absorption detections at redshift in the pilot surveys of FLASH, an…
Near-infrared micro-variability of radio-loud quasars
Matthew Whiting, Alicia Oshlack, Rachel Webster
We observed three AGN from the Parkes Half-Jansky Flat-spectrum Sample at near-infrared (NIR) wavelengths to search for micro-variability. In one source, the blue quasar PKS 2243-1…
First constraints on the AGN X-ray luminosity function at from an eROSITA-detected quasar
Julien Wolf, Kirpal Nandra, Mara Salvato +19
We searched for high-z quasars within the X-ray source population detected in the contiguous eFEDS field observed by eROSITA during the performance verification phase.…
A search for radio afterglows from gamma-ray bursts with the Australian Square Kilometre Array Pathfinder
James K. Leung, Tara Murphy, Giancarlo Ghirlanda +12
We present a search for radio afterglows from long gamma-ray bursts using the Australian Square Kilometre Array Pathfinder (ASKAP). Our search used the Rapid ASKAP Continuum Survey…
Evolutionary Map of the Universe (EMU): Observations of Filamentary Structures in the Abell S1136 Galaxy Cluster
Peter. J. Macgregor, Ray P. Norris, Andrew O'Brien +17
We present radio observations of the galaxy cluster Abell S1136 at 888 MHz, using the Australian Square Kilometre Array Pathfinder radio telescope, as part of the Evolutionary Map…
An autonomous robot for pruning modern, planar fruit trees
Alexander You, Nidhi Parayil, Josyula Gopala Krishna +7
Dormant pruning of fruit trees is an important task for maintaining tree health and ensuring high-quality fruit. Due to decreasing labor availability, pruning is a prime candidate…
An ASKAP search for a radio counterpart to the first high-significance neutron star-black hole merger LIGO/Virgo S190814bv
Dougal Dobie, Adam Stewart, Tara Murphy +27
We present results from a search for a radio transient associated with the LIGO/Virgo source S190814bv, a likely neutron star-black hole (NSBH) merger, with the Australian Square K…
A circular polarisation survey for radio stars with the Australian SKA Pathfinder
Joshua Pritchard, Tara Murphy, Andrew Zic +14
We present results from a circular polarisation survey for radio stars in the Rapid ASKAP Continuum Survey (RACS). RACS is a survey of the entire sky south of being…
VASTER: The ASKAP real-time fast-imaging pipeline -- overview and discovery of two long period transients
Yuanming Wang, Dougal Dobie, Tara Murphy +22
Recent developments in widefield radio telescopes have enabled searches of a new region of parameter space in the time domain: timescales of seconds to minutes, that have been over…
The First Large Absorption Survey in HI (FLASH): II. Pilot Survey data release and first results
Hyein Yoon, Elaine M. Sadler, Elizabeth K. Mahony +41
The First Large Absorption Survey in HI (FLASH) is a large-area radio survey for neutral hydrogen in the redshift range 0.4<z<1.0, using the 21cm HI absorption line as a probe of c…
The completeness and reliability of threshold and false-discovery-rate source extraction algorithms for compact continuum sources
Minh Huynh, Andrew Hopkins, Ray Norris +4
The process of determining the number and characteristics of sources in astronomical images is so fundamental to a large range of astronomical problems that it is perhaps surprisin…
Black Hole Mass Estimates of Radio Selected Quasars
Alicia Oshlack, Rachel Webster, Matthew Whiting
The black hole (BH) mass in the centre of AGN has been estimated for a sample of radio-selected flat-spectrum quasars to investigate the relationship between BH mass and radio prop…
DEVILS/MIGHTEE/GAMA/DINGO: The Impact of SFR Timescales on the SFR-Radio Luminosity Correlation
Robin H. W. Cook, Luke J. M. Davies, Jonghwan Rhee +20
The tight relationship between infrared luminosity (L) and 1.4 GHz radio continuum luminosity (L) has proven useful for understanding star formatio…
WALLABY Early Science - I. The NGC 7162 Galaxy Group
Tristan N. Reynolds, Tobias Westmeier, Lister Staveley-Smith +21
We present Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY) early science results from the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the NGC…
A Very Radio-Loud Narrow-Line Seyfert 1: PKS 2004-447
Alicia Oshlack, Rachel Webster, Matthew Whiting
We have discovered a very radio-loud Narrow-Line Seyfert 1 candidate: PKS 2004-447. This Seyfert is consistent with the formal definition for NLS1s, although it does not have quite…
First Search for Low-Frequency CH with a Square Kilometre Array Precursor Telescope
Chenoa D. Tremblay, James A. Green, Stacy L. Mader +2
The diatomic free radical methylidyne (CH) is an important tracer of the interstellar medium and the study of it was critical to our earliest understanding of star formation. Altho…
Source-finding for the Australian Square Kilometre Array Pathfinder
Matthew Whiting, Ben Humphreys
The Australian Square Kilometre Array Pathfinder (ASKAP) presents a number of challenges in the area of source finding and cataloguing. The data rates and image sizes are very larg…