M. Johnston‐Hollitt
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View article: A Rule-Based Conversational Agent for Mental Health and Well-Being in Young People: Formative Case Series During the Rise of Generative AI
A Rule-Based Conversational Agent for Mental Health and Well-Being in Young People: Formative Case Series During the Rise of Generative AI Open
Background There is a shortage of services available to address the growing demand for mental health support in Australia and worldwide. Digital interventions, including conversational agents, can overcome barriers to accessing mental heal…
View article: A candidate field for deep imaging of the Epoch of Reionization observed with MWA
A candidate field for deep imaging of the Epoch of Reionization observed with MWA Open
Deep imaging of structures from the Cosmic Dawn (CD) and the Epoch of Reionization (EoR) in five targeted fields is one of the highest priority scientific objectives for the Square Kilometre Array (SKA). Selecting ‘quiet’ fields, which all…
View article: MWA and VLA Observations of Diffuse Radio Lobes in M87
MWA and VLA Observations of Diffuse Radio Lobes in M87 Open
This study investigates the projected, quasi-symmetric ∼46 kiloparsec-scale diffuse radio lobes surrounding the giant elliptical galaxy M87, utilizing well-sampled wideband (60 MHz–10.55 GHz) observations from the Murchison Widefield Array…
View article: Latitudinal Dependence of the Solar Wind During Periods of High and Low Activity Through Interplanetary Scintillation
Latitudinal Dependence of the Solar Wind During Periods of High and Low Activity Through Interplanetary Scintillation Open
We present a study of the solar wind over different periods of the solar cycle, specifically focusing on the minimum between solar cycles 24 and 25, and the active, ascending phase of solar cycle 25. With the use of interplanetary scintill…
View article: MWA and VLA Observations of Diffuse Radio Lobes in M 87
MWA and VLA Observations of Diffuse Radio Lobes in M 87 Open
This study investigates the projected, quasi-symmetric $\sim\rm46\,kpc$-scale diffuse radio lobes surrounding the giant elliptical galaxy M\,87, utilizing well-sampled wideband ($\rm 60\,MHz-10.55\,GHz$) observations from MWA and VLA, supp…
View article: MeerKAT discovery of gigahertz radio emission extending from Abell 3017 towards Abell 3016
MeerKAT discovery of gigahertz radio emission extending from Abell 3017 towards Abell 3016 Open
Context. Cosmic filaments are vast, faint structures that connect galaxy clusters, often challenging to detect directly. However, filaments between pre-merger cluster pairs become more visible due to gas heating and compression while the c…
View article: Correction: An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series
Correction: An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series Open
[This corrects the article DOI: 10.2196/46849.].
View article: A Rule-Based Conversational Agent for Mental Health and Well-Being in Young People: Formative Case Series During the Rise of Generative AI (Preprint)
A Rule-Based Conversational Agent for Mental Health and Well-Being in Young People: Formative Case Series During the Rise of Generative AI (Preprint) Open
BACKGROUND There is a shortage of services available to address the growing demand for mental health support in Australia and worldwide. Digital interventions, including conversational agents, can overcome barriers to accessing mental hea…
View article: Correction: An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series (Preprint)
Correction: An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series (Preprint) Open
View article: MeerKAT discovery of GHz radio emission extending from Abell 3017 toward Abell 3016
MeerKAT discovery of GHz radio emission extending from Abell 3017 toward Abell 3016 Open
Context: The clusters Abell 3017 and Abell 3016 are located within a large-scale filament. A prominent X-ray bridge has been detected connecting the two clusters and a potential galaxy group between them. Aims: The aim of this work is to i…
View article: GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release
GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release Open
We present the second data release for the GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey. This data release is an area of 12,892-deg^2 around the South Galactic Pole region covering 20h 40m <= RA <=…
View article: CHEX-MATE: A LOFAR pilot X-ray – radio study on five radio halo clusters
CHEX-MATE: A LOFAR pilot X-ray – radio study on five radio halo clusters Open
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such a connection has only been done for integrated quantities (e.g. L…
View article: CHEX-MATE: A LOFAR pilot X-ray$-$radio study on five radio halo clusters
CHEX-MATE: A LOFAR pilot X-ray$-$radio study on five radio halo clusters Open
The connection between the thermal and non-thermal properties in galaxy clusters hosting radio halos seems fairly well established. However, a comprehensive analysis of such a connection has been made only for integrated quantities (e.g. $…
View article: Sardinia Radio Telescope observations of the Coma cluster
Sardinia Radio Telescope observations of the Coma cluster Open
We present deep total intensity and polarization observations of the Coma cluster at 1.4 and 6.6 GHz performed with the Sardinia Radio Telescope. By combining the single-dish 1.4 GHz data with archival Very Large Array observations, we obt…
View article: GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release
GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey II: Second Data Release Open
We present the second data release for the GaLactic and Extragalactic All-sky Murchison Widefield Array eXtended (GLEAM-X) survey. This data release is an area of 12 892-deg $^2$ around the South Galactic Pole region covering 20 h40 m $\le…
View article: Evolutionary map of the universe (EMU): Observations of filamentary structures in the Abell S1136 galaxy cluster
Evolutionary map of the universe (EMU): Observations of filamentary structures in the Abell S1136 galaxy cluster Open
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 of the Universe Early Science program. We compare these fin…
View article: Resolving Moving Heliospheric Structures Using Interplanetary Scintillation Observations With the Murchison Widefield Array
Resolving Moving Heliospheric Structures Using Interplanetary Scintillation Observations With the Murchison Widefield Array Open
We have conducted a blind search in 49 consecutive days of interplanetary scintillation observations made by the Murchison Widefield Array from mid‐2019, with overlapping daily observations approximately East and South‐East of the Sun at a…
View article: Resolving moving heliospheric structures using interplanetary scintillation observations with the Murchison Widefield Array
Resolving moving heliospheric structures using interplanetary scintillation observations with the Murchison Widefield Array Open
We have conducted a blind search in 49 consecutive days of interplanetary scintillation observations made by the Murchison Widefield Array from mid-2019, with overlapping daily observations approximately East and South-East of the Sun at a…
View article: An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series
An Artificial Therapist (Manage Your Life Online) to Support the Mental Health of Youth: Co-Design and Case Series Open
Background The prevalence of child and adolescent mental health issues is increasing faster than the number of services available, leading to a shortfall. Mental health chatbots are a highly scalable method to address this gap. Manage Your…
View article: Manage Your Life Online ('MYLO'): Co-design and case-series of an artificial therapist to support youth mental health.
Manage Your Life Online ('MYLO'): Co-design and case-series of an artificial therapist to support youth mental health. Open
Background: The prevalence of child and adolescent mental health issues are rising faster than the number of services available, leading to a shortfall. Mental health chatbots are a highly scalable way to address this gap. Manage Your Life…
View article: The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- I. Survey design and processing pipeline
The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- I. Survey design and processing pipeline Open
We present an overview of the Southern-sky MWA Rapid Two-metre (SMART) pulsar survey that exploits the MWA's large field of view and voltage capture system to survey the sky south of 30 degree in declination for pulsars and fast transients…
View article: The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- II. Survey status, pulsar census, and first pulsar discoveries
The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey -- II. Survey status, pulsar census, and first pulsar discoveries Open
In Paper I, we presented an overview of the Southern-sky MWA Rapid Two-metre (SMART) survey, including the survey design and search pipeline. While the combination of MWA's large field-of-view and the voltage capture system brings a survey…
View article: The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—II. Survey status, pulsar census, and first pulsar discoveries
The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—II. Survey status, pulsar census, and first pulsar discoveries Open
In Paper I, we presented an overview of the Southern-sky MWA Rapid Two-metre (SMART) survey, including the survey design and search pipeline. While the combination of MWA’s large field-of-view and the voltage capture system brings a survey…
View article: The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—I. Survey design and processing pipeline
The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—I. Survey design and processing pipeline Open
We present an overview of the Southern-sky MWA Rapid Two-metre (SMART) pulsar survey that exploits the Murchison Widefield Array’s large field of view and voltage-capture system to survey the sky south of 30 $^{\circ}$ in declination for p…
View article: Detection of Magnetic Fields and Diffuse Radio Emission in Abell 3667 and other Rich Southern Clusters of Galaxies
Detection of Magnetic Fields and Diffuse Radio Emission in Abell 3667 and other Rich Southern Clusters of Galaxies Open
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View article: The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—II. Survey status, pulsar census, and first pulsar discoveries – ADDENDUM
The Southern-sky MWA Rapid Two-metre (SMART) pulsar survey—II. Survey status, pulsar census, and first pulsar discoveries – ADDENDUM Open
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View article: MWAX: A new correlator for the Murchison Widefield Array
MWAX: A new correlator for the Murchison Widefield Array Open
We describe the design, validation, and commissioning of a new correlator termed ‘MWAX’ for the Murchison Widefield Array (MWA) low-frequency radio telescope. MWAX replaces an earlier generation MWA correlator, extending correlation capabi…
View article: Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA
Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA Open
Abell 3266 is a massive and complex merging galaxy cluster that exhibits significant substructure. We present new, highly sensitive radio continuum observations of Abell 3266 performed with the Australian Square Kilometre Array Pathfinder …
View article: Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA
Radio fossils, relics, and haloes in Abell 3266: cluster archaeology with ASKAP-EMU and the ATCA Open
Abell 3266 is a massive and complex merging galaxy cluster that exhibits significant substructure. We present new, highly sensitive radio continuum observations of Abell 3266 performed with the Australian Square Kilometre Array Pathfinder …
View article: Independent Discovery of a Nulling Pulsar with Unusual Subpulse Drifting Properties with the Murchison Widefield Array
Independent Discovery of a Nulling Pulsar with Unusual Subpulse Drifting Properties with the Murchison Widefield Array Open
We report the independent discovery of PSR J0026-1955 with the Murchison Widefield Array (MWA) in the ongoing Southern-sky MWA Rapid Two-metre pulsar survey. J0026-1955 has a period of ∼1.306 s, a dispersion measure of ∼20.869 pc cm −3 , a…