Adam T. Deller
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View article: Exploring the Galactic plasma with pulsars in the SKA Era
Exploring the Galactic plasma with pulsars in the SKA Era Open
The ionised media that permeate the Milky Way have been active topics of research since the discovery of pulsars in 1967. In fact, pulsars allow one to study several aspects of said plasma, such as their column density, turbulence, scatter…
View article: Testing Gravity with Binary Pulsars in the SKA Era
Testing Gravity with Binary Pulsars in the SKA Era Open
Binary (and trinary) radio pulsars are natural laboratories in space for understanding gravity in the strong field regime, with many unique and precise tests carried out so far, including the most precise tests of the strong equivalence pr…
View article: Understanding the Neutron Star Population with the SKAO telescopes
Understanding the Neutron Star Population with the SKAO telescopes Open
The known population of non-accreting neutron stars is ever growing and currently consists of more than 3500 sources. Pulsar surveys with the SKAO telescopes will greatly increase the known population, adding radio pulsars to every subgrou…
View article: A depolarization census of ASKAP fast radio bursts
A depolarization census of ASKAP fast radio bursts Open
Fast radio bursts (FRBs) are luminous, dispersed pulses of extragalactic origin. The physics of the emission mechanism, the progenitor environment, and their origin are unclear. Some repeating FRBs exhibit a frequency-dependent decrease in…
View article: Mapping the Spatial Distribution of Fast Radio Bursts within their Host Galaxies
Mapping the Spatial Distribution of Fast Radio Bursts within their Host Galaxies Open
We present deep optical and near-infrared observations of the host galaxies of 34 fast radio bursts (FRBs) detected by the Commensal Real-time ASKAP Fast Transient (or CRAFT) survey on the Australian SKA Pathfinder (ASKAP) to compare the l…
View article: Investigating the influence of radio-faint AGN activity on the infrared-radio correlation of massive galaxies
Investigating the influence of radio-faint AGN activity on the infrared-radio correlation of massive galaxies Open
It is well-known that star-forming galaxies (SFGs) exhibit a tight correlation between their radio and infrared emissions, commonly referred to as the infrared-radio correlation (IRRC). Recent empirical studies have reported a dependence o…
View article: Long-term Astrometric Monitoring of the Galactic Center Magnetar PSR J1745−2900
Long-term Astrometric Monitoring of the Galactic Center Magnetar PSR J1745−2900 Open
We present new astrometric observations of the Galactic center magnetar PSR J1745−2900 with the Very Long Baseline Array. Combined with previously published measurements in 10 epochs that spanned 477 days, the complete data set consists of…
View article: EP240801a/XRF 240801B: An X-Ray Flash Detected by the Einstein Probe and the Implications of Its Multiband Afterglow
EP240801a/XRF 240801B: An X-Ray Flash Detected by the Einstein Probe and the Implications of Its Multiband Afterglow Open
We present multiband observations and analysis of EP240801a, a low-energy, extremely soft gamma-ray burst (GRB) discovered on 2024 August 1 by the Einstein Probe (EP) satellite with a weak contemporaneous signal also detected by the Fermi …
View article: First results from the UTMOST-NS pulsar timing programme
First results from the UTMOST-NS pulsar timing programme Open
The UTMOST-NS pulsar timing programme operated at the Molonglo Observatory Synthesis Telescope from April 2021 to June 2023, observing 173 pulsars with an average cadence of 50 pulsars per day. An overview of the programme is presented, de…
View article: A Nanosecond-duration Radio Pulse Originating from the Defunct Relay 2 Satellite
A Nanosecond-duration Radio Pulse Originating from the Defunct Relay 2 Satellite Open
We report the detection of a burst of emission over a 695.5–1031.5 MHz bandwidth by the Australian Square Kilometre Array Pathfinder. The burst was localized through analysis of near-field time delays to the long-decommissioned Relay 2 sat…
View article: An investigation into correlations between FRB and host galaxy properties
An investigation into correlations between FRB and host galaxy properties Open
Impulsive radio signals such as fast radio bursts (FRBs) are imprinted with the signatures of multi-path propagation through ionised media in the form of frequency-dependent temporal broadening of the pulse profile (scattering). The domina…
View article: The Low Mass Dwarf Host Galaxy of Non-Repeating FRB 20230708A
The Low Mass Dwarf Host Galaxy of Non-Repeating FRB 20230708A Open
We present Very Large Telescope/X-Shooter spectroscopy for the host galaxies of 12 fast radio bursts (FRBs) detected by the Australian SKA Pathfinder (ASKAP) observed through the ESO Large Programme "FURBY", which imposes strict selection …
View article: Detection of X-ray emission from a bright long-period radio transient
Detection of X-ray emission from a bright long-period radio transient Open
Recently, a class of long-period radio transients (LPTs) has been discovered, exhibiting emission thousands of times longer than radio pulsars1-5. These findings, enabled by advances in wide-field radio surveys, challenge existing models o…
View article: FRB Line-of-sight Ionization Measurement from Lightcone AAOmega Mapping Survey: The First Data Release
FRB Line-of-sight Ionization Measurement from Lightcone AAOmega Mapping Survey: The First Data Release Open
This paper presents the first public data release (DR1) of the FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping (FLIMFLAM) survey, a wide field spectroscopic survey targeted on the fields of 10 precisely localized fa…
View article: The Discovery of a 41 s Radio Pulsar PSR J0311+1402 with ASKAP
The Discovery of a 41 s Radio Pulsar PSR J0311+1402 with ASKAP Open
The emerging population of long-period radio transients (LPTs) shows both similarities and differences with normal pulsars. A key difference is that their radio emission is too bright to be powered solely by rotational energy. Various mode…
View article: Unusual Intraburst Variations of Polarization States in FRB 20210912A and FRB 20230708A: Effects of Plasma Birefringence?
Unusual Intraburst Variations of Polarization States in FRB 20210912A and FRB 20230708A: Effects of Plasma Birefringence? Open
Fast radio bursts (FRBs) are highly energetic events of short-duration intense radio emission, the origin of which remains elusive. Polarization of the FRB signals carries information about the emission source as well as the magnetoionic m…
View article: Constraints on LIGO/Virgo compact object mergers from late-time radio observations
Constraints on LIGO/Virgo compact object mergers from late-time radio observations Open
We present results from a search for radio afterglows of compact object mergers conducted with the Australian SKA Pathfinder (ASKAP). We used data from four epochs of the Rapid ASKAP Continuum Survey to search compact binary merger localiz…
View article: Constraints on LIGO/Virgo Compact Object Mergers from Late-time Radio Observations
Constraints on LIGO/Virgo Compact Object Mergers from Late-time Radio Observations Open
We present results from a search for radio afterglows of compact object mergers conducted with the Australian SKA Pathfinder. We used data from four epochs of the Rapid ASKAP Continuum Survey to search compact binary merger localization re…
View article: The discovery of a 41s radio pulsar PSR J0311+1402 with ASKAP
The discovery of a 41s radio pulsar PSR J0311+1402 with ASKAP Open
The emerging population of long-period radio transients (LPTs) show both similarities and differences with normal pulsars. A key difference is that their radio emission is too bright to be powered solely by rotational energy. Various model…
View article: The radio afterglow of the ultra-long GRB 220627A
The radio afterglow of the ultra-long GRB 220627A Open
We present the discovery of the radio afterglow of the most distant ultra-long gamma-ray burst (GRB) detected to date, GRB~220627A at redshift $z=3.084$. Its prompt gamma-ray light curve shows a double-pulse profile, with the pulses separa…
View article: The CRAFT coherent (CRACO) upgrade I: System description and results of the 110-ms radio transient pilot survey
The CRAFT coherent (CRACO) upgrade I: System description and results of the 110-ms radio transient pilot survey Open
We present the first results from a new backend on the Australian Square Kilometre Array Pathfinder, the Commensal Realtime ASKAP Fast Transient COherent (CRACO) upgrade. CRACO records millisecond time resolution visibility data, and searc…
View article: The commensal real-time ASKAP fast transient incoherent-sum survey
The commensal real-time ASKAP fast transient incoherent-sum survey Open
With wide-field phased array feed technology, the Australian Square Kilometre Array Pathfinder (ASKAP) is ideally suited to search for seemingly rare radio transient sources that are difficult to discover previous-generation narrow-field t…
View article: Enhanced astrometry of the rapid ASKAP continuum survey for precise localisation of fast radio bursts
Enhanced astrometry of the rapid ASKAP continuum survey for precise localisation of fast radio bursts Open
Fast radio bursts (FRBs) are short, intense radio signals from distant astrophysical sources, and their accurate localisation is crucial for probing their origins and utilising them as cosmological tools. This study focuses on improving th…
View article: VLBA astrometry of PSRs B0329+54 and B1133+16: Improved pulsar distances and comparison of global ionospheric models
VLBA astrometry of PSRs B0329+54 and B1133+16: Improved pulsar distances and comparison of global ionospheric models Open
Very long baseline interferometry (VLBI) astrometry is used to determine the three-dimensional position and proper motion of astronomical objects. A typical VLBI astrometric campaign generally includes around ten observations, making it ch…
View article: The fast radio burst population energy distribution
The fast radio burst population energy distribution Open
We examine the energy distribution of the fast radio burst (FRB) population using a well-defined sample of 63 FRBs from the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope, 28 of which are localised to a host galaxy. W…
View article: An investigation into correlations between FRB and host galaxy properties
An investigation into correlations between FRB and host galaxy properties Open
Impulsive radio signals such as fast radio bursts (FRBs) are imprinted with the signatures of multi-path propagation through ionised media in the form of frequency-dependent temporal broadening of the pulse profile, commonly referred to as…
View article: FRB 20230708A, a quasi-periodic FRB with unique temporal-polarimetric morphology
FRB 20230708A, a quasi-periodic FRB with unique temporal-polarimetric morphology Open
There has been a rapid increase in the known fast radio burst (FRB) population, yet the progenitor(s) of these events have remained an enigma. A small number of FRBs have displayed some level of quasi-periodicity in their burst profile, wh…