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Dr Gavin Rowell (School of Physical Sciences, University of Adelaide)04/11/2025, 10:00
I will present a brief status report on CTAO.
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Dr Gavin Rowell (School of Physical Sciences, University of Adelaide)04/11/2025, 10:20
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Nir Guttman04/11/2025, 10:40
A concise overview of gravitational-wave science: the nature of gravitational waves and how we detect them, highlighting results from the latest catalog as the field shifts from first detections to using gravitational waves as precision probes of the universe.
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Lachlan Passenger04/11/2025, 11:30
Bayesian statistical methods form the foundation for signal extraction from gravitational-wave data. Commonly, these methods assume a functional form for the signal, and provide estimates for the function’s parameters. Gaussian processes allow for flexible modelling of signals, for which the functional form is unknown but the overall structure is. I’ll describe the kinds of problems that are...
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Sabrina Einecke (The University of Adelaide, Australia)04/11/2025, 11:50
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Simon Lee (School of Physical Sciences, University of Adelaide)04/11/2025, 13:30
In July 2025 the initial build of a quarter camera (QCAM-i) designed for the Cherenkov Telescope Array Observatory (CTAO) Small Sized Telescope (SST) design was tested observing the sky above Tenerife, Canary Islands. This was the first field test of the camera hardware which will eventually be used across dozens of SSTs at CTAO-South in Chile. Dark field observations (pointed away from known...
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Cyrus Walther (TU Dortmund University)04/11/2025, 13:55
Modeling the emission of gamma-ray photons of blazars is often performed as a core step in short-term IACT blazar analyses. It is, however, of interest to analyze the temporal component of blazar emission on a long-term scale, which yields insights into temporal aspects of acceleration mechanisms through comparison with theoretical modeling.
This requires, on one hand, a consistent and...
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Liam Pinchbeck (Monash University)04/11/2025, 14:15
Dark matter is one of the most important, elusive and enduring mysteries of physics in the last century. Gamma ray astronomy offers a possible avenue to determine dark matter's particle nature through observation of gamma ray by-products of its annihilation or decay. However, it is challenging to formulate a robust dark matter search given our lack of knowledge on dark matter physics and...
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Roland Crocker (Research School of Astronomy and Astrophysics, Australian National University)04/11/2025, 14:40
Cosmic rays that escape from star-forming galaxies may significantly influence the dynamics or thermodynamics of the circumgalactic gas reservoir that sustains star formation over long timescales. I will explain how our semi-analytic model for cosmic ray transport and energy loss in the CGM can, in combination with empirical inputs, constrain the importance of cosmic rays in the CGM...
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Hayden James (Adelaide University)04/11/2025, 15:35
The upcoming Cherenkov Telescope Array Observatory (CTAO) presents a unique opportunity to probe the as-yet unexplained Fermi-LAT galactic centre gamma-ray excess (GCE). I will present results from my research that show CTAO may be able to distinguish between two different origins of the GCE.
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Ms Violet Harvey (The University of Adelaide)04/11/2025, 15:55
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Lydia Castellucci (Adelaide University)04/11/2025, 16:20
At very high energies, there is a deficiency in the number of muons produced in hadronic extensive air showers (EAS) in simulated interaction models compared to experimental measurements. Imaging atmospheric Cherenkov telescopes (IACTs) can be used to study this ‘muon puzzle’. These telescopes detect the resultant Cherenkov light emitted from the interaction of cosmic rays with atmospheric...
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Zachary Smeaton (WSU)05/11/2025, 09:30
The Large Magellanic Cloud (LMC) is one of our nearest galactic neighbours and has been well-surveyed at multiple frequencies. A recent MeerKAT radio-continuum survey provides unprecedented sensitivity and resolution of the LMC, revealing its supernova remnant (SNR) population in greater detail than previously seen. Combining this new data with previous multi-frequency surveys, I have...
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Miroslav Filipovic (Western Sydney University)05/11/2025, 10:00
These are golden days for radio-astronomy... A number of new cool discoveries at are steadyly coming from the new generation of radio telescopes. I will update CTA-Oz with the latest results in this space.
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Aaron Bradley (WSU)05/11/2025, 10:30
We present an update on the previously discussed StarFiSH legacy survey. StarFiSH is a 7 mm dense gas survey that mapped the fourth quadrant Galactic Plane. The data have remained relatively untouched, and would be a crucial ancillary data set for high-energy Galactic targets for the CTA. In this update, we provide an update of the ongoing collaborations for the reduction of the data, as well...
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Jess Broderick (SKAO)05/11/2025, 11:30
The Square Kilometre Array Observatory (SKAO) Science Operations Team is focused on the development and implementation of various workflows and procedures to ensure that SKA-Low and SKA-Mid will be operationally ready for transformational science. In this talk, I will give an update on the telescope capability rollout, as well as plans for the upcoming Science Verification phase.
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Ahmad Al-khalaila (WSU)05/11/2025, 12:00
The work focused on measuring the linear polarization of bright and faint stars to validate the instrument’s performance and refine the data-reduction pipeline. Using a sequence of retarder-angle images, we calculated the polarization fraction and angle, tested calibration consistency, and automated key steps in the Python-based workflow. These results establish a reliable framework for...
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James Murray (Astronomy Australia Limited)05/11/2025, 12:25
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Dr Gavin Rowell (School of Physical Sciences, University of Adelaide)05/11/2025, 14:00
The CTAO represents the next major step in TeV gamma-ray astronomy. CTAO is now under construction at two sites - a northern site at La Palma, Spain, and a southern site at Paranal, Chile. Together, the CTAO's North and South arrays will provide an order of magnitude improvement in performance beyond current instruments (like HESS and MAGIC) to unveil the gamma-ray sky like never before....
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Imogen Barnsley (Adelaide University)
To reveal the nature of high-energy gamma-ray sources and to understand the associated emission and acceleration mechanisms, we need detailed models capable of reproducing the observed energy spectra and morphologies. Gamma rays can be produced in non-thermal radiation processes involving protons and electrons interacting with the interstellar medium (ISM). These protons and electrons...
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Edmund McKennall (Adelaide University)
Since their discovery in 1912, the origin of cosmic rays remains a mystery. The energy spectrum of cosmic rays suggests that these charged particles can be accelerated up to PeV energies within our Galaxy by so-called PeVatrons. As these charged particles propagate through the Galaxy, they are deflected by interstellar magnetic fields, as such we cannot trace them back. Instead, alternative...
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Jemma Pilossof (Adelaide University)
The origin of cosmic rays has been an active area of research since their discovery over a century ago. Supernova remnants (SNRs) are believed to be able to accelerate cosmic rays up to the ‘knee’ of the observed cosmic-ray spectrum via diffusive shock acceleration, a feature likely indicating the maximum cosmic-ray energy achieved in our Galaxy. Although the acceleration at SNR shocks has...
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Dr Gavin Rowell (School of Physical Sciences, University of Adelaide)
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