-
Prof. Steven Tingay (ICRAR-Curtin)28/07/2026, 08:05
-
Natasha Hurley-Walker (Curtin / ICRAR)TransientsPresentation
Recent radio surveys have demonstrated that the radio sky is far more dynamic and variable than previously thought, with a host of new transient discoveries rapidly following wide-area surveys conducted with SKA precursors such as LOFAR, ASKAP, and the MWA. In particular, the long-period radio transients (LPTs) have motivated searches of the time domain between seconds to hours, a timescale...
Go to contribution page -
Danny Jacobs (Arizona State University), Sara Jones (Arizona State University)Epoch of ReionizationPresentation
Interference arriving from over-the-horizon (OTH) is a known systematic for 21cm cosmology and other MWA science cases, but no predictive model or systematic survey exists. It is most easily seen in TV channels in the 175–200 MHz band. EDGES has logged continuous 24-hr power spectra since 2010, providing a unique long-baseline record of the RFI environment at the MRO. The daily format of the...
Go to contribution page -
Prof. Christopher Riseley (Astronomisches Institut der Ruhr-Universität Bochum (AIRUB))Galactic and ExtragalacticPresentation
It is well-established that radio continuum provides both an unobscured tracer of star formation as well as a window into the magnetic field strength in galaxies. In this context, understanding the injection and propagation of cosmic rays (CR) in the interstellar medium, and how these process couple to star formation activity — as well as a galaxy’s star formation history — is crucial to...
Go to contribution page -
Zhenghao Zhu (Shanghai Astronomical Observatory，Chinese Academy of Sciences)Epoch of ReionizationPresentation
Chromatic instrumental response is a major source of foreground leakage in 21-cm Epoch-of-Reionization measurements. We explore a conceptual scaled-array strategy in which antenna coordinates are scaled with observing frequency so that, in the WODEN simulations, the frequency-normalised uvw sampling is common across channels to numerical precision. This removes one source of instrumental...
Go to contribution page -
Adrien Devresse (SKACH - EPFL)Other
Space reserved
Go to contribution page -
Aidan LaBella (Brown University)Epoch of ReionizationPresentation
We investigate a strategy for improving radio frequency interference (RFI) flagging using roughly 60 hours of observations from the 2016 EoR high-band observing run of the Murchison Widefield Array. We develop a novel machine learning-based \textit{weak supervision} method where traditional flagging methods such as AOFlagger, SSINS, $\chi^2$, X-RFI and EAVILS are used to generate stronger...
Go to contribution page -
Greg Sleap (Curtin University/Murchison Widefield Array)Engineering and OperationsPresentation
In this presentation, I will provide an update on the status of the MWA archive, backend systems, MWA ASVO enhancements and introduce the real-time beamformer for the MWA.
In May 2026, we released a beta version of an imaging feature for the MWA ASVO data portal. The main use case for this feature is to allow non-expert researchers to generate quick look images of MWA observations. Users...
Go to contribution page -
Lauren Dressler (University of Washington)Epoch of ReionizationPresentation
The recent MWA Phase III upgrade included the deployment of new receivers and a new correlator, which has significantly improved data quality for 21 cm cosmology. In particular, data taken in the new oversampled mode does not suffer major spectral contamination due to coarse channelization, making it possible to observe subtle instrumental effects that were previously difficult to isolate....
Go to contribution page -
Piyush PanchalHigh Performance ComputingPresentation
The single-node, single-GPU implementation of the FDD algorithm surpassed Presto's CPU based implementation by several orders of magnitude. We extend it to a multi-node, multi-GPU implementation using MPI and the overlap-add technique. It enables faster processing of long timeseries data, too big for single compute nodes, by leveraging modern multi-GPU compute nodes and distributed filesystems...
Go to contribution page -
John MorganSolar, Heliospheric and Ionospheric SciencePresentation
While MWA calibration solutions can usually be applied successfully to nighttime observations over several hours, the same is not true for daytime observations. This is particularly problematic for observations of the Sun, since the Sun's emission can change rapidly with frequency and time, meaning that there is no sky model to calibrate against.
Through the use of a large archive of...
Go to contribution page -
Cathryn Trott (ICRAR - Curtin University)Epoch of ReionizationPresentation
The first season of Phase 3 data has demonstrated excellent data quality across the full frequency range of the EoR experiments, encompassing 6.2 < z < 9.0. I will present early results from the 2025A season, compared with Phase 1 and 2 data, and showcase some of the current work to prepare for 2026A and upcoming publications, on behalf of the MWA EoR Collaboration.
Go to contribution page -
Mitchell Burdorf (Brown Physics -- Jonathan Pober Lab)Epoch of ReionizationPresentation
MWA observations simulated with the radio interferometry simulator pyuvsim are passed through the FHD-eppsilon analysis pipeline to verify behavior on known sky models. These simulations use a power spectrum that is logarithmically flat in power generated from sampling white Gaussian noise. We examine how the output power spectrum amplitude varies across frequency ranges, internal pipeline...
Go to contribution page -
Christopher Lee (Curtin University)Pulsars and Fast TransientsPresentation
The double pulsar binary system (J0737$-$3039A/B) is a gold-standard laboratory for testing general relativity in the strong field regime, and as such has been the target of pulsar timing campaigns for over 20 years. Yet, despite the system's high profile within and outside of the pulsar community, there have been very limited observations below 300 MHz. Past observing campaigns above 800 MHz...
Go to contribution page -
Natasha Hurley-Walker (Curtin / ICRAR)Transients
The Phase 3 MWA offers a huge boost in sensitivity and time-domain capability, both of which are vital for exploration of transient phenomena. In this talk I will outline the opportunities and challenges for time-domain science with the Phase 3 MWA, and suggest some synergies with other wavelengths, instruments, and surveys.
Go to contribution page -
Dr Kathryn Ross (AusSRC - Curtin University)Galactic and ExtragalacticPresentation
The GaLactic and Extragalactic All-sky MWA eXtended (GLEAM-X) survey boasts twice the resolution, and up to an order of magnitude higher sensitivity to its predecessor the GLEAM survey. Several parts have already been released, including a Galactic Plane release combining GLEAM and GLEAM-X, and the South Galactic Pole release. In this talk, I present the entire GLEAM-X survey covering the...
Go to contribution page -
Mr Kenil Ajudiya (Curtin Institute of Radio Astronomy)High Performance ComputingPresentation
Inyarrimanha Ilgari Bundara, CSIRO’s Murchison Radiastronomy Observatory, is a radio quiet zone that reduces “local” RFI observed by the MWA. However, it is vulnerable to several types of RFI - satellite signals, RFI ducted by the ionosphere, television signals from far away, etc. The effect of RFI is to increase the background noise level, decreasing the S/N ratio of astronomical signals of...
Go to contribution page -
Jade Ducharme (Brown University)Epoch of ReionizationPresentation
Moving sources of radio-frequency interference (RFI), such as airplanes and satellites, can contaminate interferometric data in ways that are difficult to identify and mitigate with standard flagging approaches. We introduce a new modeling scheme for moving sources of radio frequency interference based on the characteristic imprint they leave in the $uv$-plane. Given a known source trajectory...
Go to contribution page -
Yuxiang Qin (Australian National University)Epoch of ReionizationPresentation
The cosmic 21-cm signal provides a powerful window into the unseen galaxies that shaped the thermal and ionization history of the intergalactic medium (IGM), the reservoir of neutral hydrogen responsible for the emission itself. At present, the Murchison Widefield Array (MWA) stands among the leading low-frequency interferometers dedicated to this pursuit, alongside LOFAR and HERA. While HERA...
Go to contribution page -
Dr Angie Waszewski (University of Newcastle)Solar, Heliospheric and Ionospheric SciencePresentation
The MWA has a growing archive of dedicated solar observing campaigns, with existing data already spanning over a full solar cycle. However, processing solar observations can be both resource intensive and time consuming, and some early observations lack robust daytime calibration observations.
Go to contribution page
To address these problems we have developed a lightweight data reduction pipeline that focuses on... -
Nichole Barry (University of New South Wales)Epoch of ReionizationPresentation
The Epoch of Reionisation (EoR) is one of the prime science directives for many current and future low-frequency radio interferometers, including the Murchison Widefield Array (MWA) and the Low Frequency Array (LOFAR). This elusive signal has yet to be measured, despite over a decade of measurements. Up until this point, analysis of MWA and LOFAR EoR data has been entirely separate, even...
Go to contribution page -
Satyapan Munshi (Australian National University)Epoch of ReionizationPresentation
One of the foremost challenges in detecting the 21-cm signal from the high-redshift Universe is the astrophysical foreground emission, which obscures the faint background signal. MWA and LOFAR, being similar instruments by design, share broadly similar philosophies for modelling and subtracting known foreground contributions from visibilities, and for estimating the 21-cm signal power...
Go to contribution page -
Dr Chia Min TanPulsars and Fast TransientsPresentation
Over the past decade, the voltage capture system (VCS) has been an integral part of much of the pulsar and fast transient science with the Murchison Widefield Array (MWA). While the use of VCS posed substantial challenges in large scale data management and the inevitable bespoke software development, its capability to provide high-time resolution data over a large field of view has enabled a...
Go to contribution page -
Ramesh Bhat (Dr)Pulsars and Fast TransientsPresentation
Over the past decade, the legacy and MWAX VCS systems have enabled a wealth of pulsar and fast transient (PFT) science, culminating in the SMART survey project, an all-sky survey for pulsars and fast transients in the low-frequency southern skies. As we enter the Phase III era, the advent of real-time beamforming brings several new and exciting science opportunities. It will enable timing...
Go to contribution page -
Morgan Lee (Brown University)Epoch of ReionizationPresentation
The 2025 Phase III upgrade offers the highest-quality EoR data from the MWA to date, but the critical challenge of locating clean data from this season remains. I will present the analysis of all 2025 MWA Phase III high-band EoR0 observations with a focus on RFI detection and a study of RFI flagging strategy on the power spectrum. To-date, we have used two distinct RFI flagging methods, namely...
Go to contribution page -
Cristian Di PietrantonioPulsars and Fast Transients
Radio telescopes observing at frequencies above 400 MHz have been routinely detecting fast radio bursts (FRBs) over the past seven years, with the second CHIME catalogue presenting more than 4000 FRBs. In contrast, detections below 300 MHz are still extremely rare, with only one confirmed detection known in the literature. In this talk I will present the first-ever low-frequency (< 300 MHz)...
Go to contribution page
Choose timezone
Your profile timezone: