A5049156606- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Particle accelerators and beam dynamics
- GNSS positioning and interference
- Radar Systems and Signal Processing
- Target Tracking and Data Fusion in Sensor Networks
- Sparse and Compressive Sensing Techniques
- Magnetic confinement fusion research
- Particle Accelerators and Free-Electron Lasers
- Astrophysical Phenomena and Observations
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- High-pressure geophysics and materials
- Gyrotron and Vacuum Electronics Research
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
Swinburne University of Technology
2023-2025
Abstract We present the first results from a new backend on Australian Square Kilometre Array Pathfinder, Commensal Realtime ASKAP Fast Transient COherent (CRACO) upgrade. CRACO records millisecond time resolution visibility data, and searches for dispersed fast transient signals including radio bursts (FRB), pulsars, ultra-long period objects (ULPO). With can localise events to arcsecond-level precision after detection. Here, we describe system report result sky survey carried out by at...
Abstract 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 discover previous-generation narrow-field telescopes. The Commensal Real-time ASKAP Fast Transient (CRAFT) Survey Science Project has developed instrumentation continuously fast transients (duration ≲ 1 second) with ASKAP, a particular focus on finding and localising Radio Bursts (FRBs). Since...
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. The Commensal Real-time ASKAP Fast Transient (CRAFT) Survey Science Project has developed instrumentation continuously fast transients (duration $\lesssim$ 1 second) with ASKAP, a particular focus on finding and localising Radio Bursts (FRBs). Of interest are Since 2018, CRAFT survey been searching FRBs other by...
Abstract The emerging population of long-period radio transients (LPTs) shows both similarities and differences with normal pulsars. A key difference is that their emission too bright to be powered solely by rotational energy. Various models have been proposed (including white dwarf or neutron star origins), nature remains uncertain. Known LPTs minutes-to-hours-long spin periods, while pulsars periods ranging from milliseconds seconds. Here, we report the discovery PSR J0311+1402, an object...
ABSTRACT As the sample size of repeating fast radio bursts (FRBs) has grown, an increasing diversity phenomenology emerged. Through long-term multi-epoch studies FRBs, it is possible to assess which phenomena are common population and unique individual sources. We present a monitoring campaign FRB source 20180301A using ultra-wideband low (UWL) receiver observations with Murriyang, Parkes 64-m telescope. The covered wide frequency band spanning approximately 0.7–4 GHz, yielded detection 46...
Abstract There has been a rapid increase in the known fast radio burst (FRB) population, yet progenitor(s) of these events have remained an enigma. A small number FRBs displayed some level quasi-periodicity their profile, which can be used to constrain plausible progenitors. However, studies suffer from lack polarisation data greatly assist constraining possible FRB progenitors and environments. Here we report on detection characterisation 20230708A by Australian Square Kilometre Array...
Fast Radio Bursts (FRBs) are short-timescale transients of extragalactic origin. The number detected FRBs has grown dramatically since their serendipitous discovery from archival data. Some have also been seen to repeat. polarimetric properties repeating show diverse behaviour and, at times, extreme morphology, suggesting a complex magneto-ionic circumburst environment for this class FRB. such as circular polarisation crucial understanding surrounding magnetic-ionic environment. previously...
Abstract Fast Radio Bursts (FRBs) are short-timescale transients of extragalactic origin. The number detected FRBs has grown dramatically since their serendipitous discovery from archival data. Some have also been seen to repeat. polarimetric properties repeating show diverse behaviour and, at times, extreme morphology, suggesting a complex magneto-ionic circumburst environment for this class FRB. such as circular polarisation crucial understanding surrounding magnetic-ionic environment....
ABSTRACT Fast Radio Bursts (FRBs) are extragalactic transients of (sub-)millisecond duration that show wide-ranging spectral, temporal, and polarimetric properties. The analysis FRBs can be used to probe intervening media, study the emission mechanism, test possible progenitor models. In particular, low-frequency depolarization identify dense, turbulent, magnetized, ionized plasma thought near FRB progenitor. An ensemble repeating has shown depolarization. is quantified by parameter $\sigma...
We present the first results from a new backend on Australian Square Kilometre Array Pathfinder, Commensal Realtime ASKAP Fast Transient COherent (CRACO) upgrade. CRACO records millisecond time resolution visibility data, and searches for dispersed fast transient signals including radio bursts (FRB), pulsars, ultra-long period objects (ULPO). With can localise events to arcsecond-level precision after detection. Here, we describe system report result sky survey carried out by at 110ms during...
There has been a rapid increase in the known fast radio burst (FRB) population, yet progenitor(s) of these events have remained an enigma. A small number FRBs displayed some level quasi-periodicity their profile, which can be used to constrain plausible progenitors. However, studies suffer from lack polarisation data greatly assist constraining possible FRB progenitors and environments. Here we report on detection characterisation 20230708A by Australian Square Kilometre Array Pathfinder...
As the sample size of repeating fast radio bursts (FRBs) has grown, an increasing diversity phenomenology emerged. Through long-term multi-epoch studies FRBs, it is possible to assess which phenomena are common population and unique individual sources. We present a monitoring campaign FRB source 20180301A using ultra-wideband low (UWL) receiver observations with Murriyang, Parkes 64-m telescope. The covered wide frequency band spanning approximately 0.7--4 GHz, yielded detection 46 bursts....
Fast Radio Bursts (FRBs) are extragalactic transients of (sub-)millisecond duration that show wide-ranging spectral, temporal, and polarimetric properties. The analysis FRBs can be used to probe intervening media, study the emission mechanism, test possible progenitor models. In particular, low frequency depolarisation identify dense, turbulent, magnetised, ionised plasma thought near FRB progenitor. An ensemble repeating has shown low-frequency depolarisation. is quantified by parameter...