BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Australia Telescope National Facility - ECPv6.16.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Australia Telescope National Facility
X-ORIGINAL-URL:https://www.atnf.csiro.au
X-WR-CALDESC:Events for Australia Telescope National Facility
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Australia/Sydney
BEGIN:STANDARD
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
DTSTART:20220402T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20221001T160000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
DTSTART:20230401T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20230930T160000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
DTSTART:20240406T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20241005T160000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230208T150000
DTEND;TZID=Australia/Sydney:20230208T160000
DTSTAMP:20260518T055609
CREATED:20250819T061850Z
LAST-MODIFIED:20250819T061851Z
UID:14882-1675868400-1675872000@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Yuanming Wang (University of Sydney)
DESCRIPTION:Image-plane radio transients on short-timescales with ASKAP\n\nAbstract\n\nShort bursts\, flares\, scintillation and other radio time-domain phenomena usually imply extreme astrophysical environments (e.g. strong magnetic fields) that are difficult to achieve on Earth. This time-domain parameter space\, however\, is relatively unexplored historically\, mainly limited by instrumental sensitivity and field-of-view (FoV). In this talk I will present unusual time-domain transient events I have discovered with the Australian Square Kilometre Array Pathfinder (ASKAP) telescope\, including extreme scintillation\, flaring stars\, and pulsars. \n\n We have used ASKAP to probe timescales of seconds to hours\, searching for rapidly varying radio sources. With the advantage of the large FoV\, we discovered a group of fast-scintillating galaxies arranged linearly on the sky\, spanning approximately 2 degrees. Using this unlikely sky distribution we inferred the presence of a nearby\, straight\, and high-pressured plasma filament between the Earth and those galaxies\, which produces extreme scintillation. Circular polarisation is another poorly explored parameter-space. With ASKAP dual-polarisation beams\, we identified a new pulsar (rapidly rotating neutron star) PSR J0523-7125 through its strong circularly polarised emission and variable behaviour. PSR J0523-7125 shows many unusual properties (e.g.\, upturn spectrum shape)\, which may shed light on the as-yet-unknown pulsar coherent emission mechanism. \n\n Our discovery has filled gaps in this unexplored time-domain parameter space\, and highlighted a new way of finding unusual pulsars – useful for future space-time experiments. The existence of a nearby\, high-pressured plasma filament also changes our understanding of the origins of extreme scintillation\, and requires new models to explain the underlying phenomenon\, as existing theoretical models are incompatible with the structure we measured. The image above is an artist’s illustration of the new pulsar found in the LMC. \n\n \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-yuanming-wang-university-of-sydney/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-08022023-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20230215T150000
DTEND;TZID=Australia/Sydney:20230215T160000
DTSTAMP:20260518T055609
CREATED:20250819T061824Z
LAST-MODIFIED:20250819T061825Z
UID:14883-1676473200-1676476800@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Nipanjana Patra (Curtin)
DESCRIPTION:“That is not only not right; it is not even wrong.” – Wolfgang Pauli\n\nAbstract\n\nCorroboration of the detection of a redshifted 21cm signal from the Cosmic Dawn is more challenging than the first detection. For\, there exists no independent science-verification framework against which an individual telescope’s output can be tested to claim any successful detection. Consequently\, experimental findings cannot be unambiguously verified\, especially when unsupported by existing observational evidence. HYdrogen Probe of the Epoch of REIONization (HYPEREION) is an experiment designed to corroborate the first detection of the Cosmic Dawn signal. For the first time\, the instrument design approach has delivered a set of global standards to be met by any second-generation 21cm experiments to claim a successful detection and corroborate each other’s findings. In this talk\, I will discuss the instrument design\, measurement methodology\, initial results\, and future plans. \n\n \nWatch recording\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-nipanjana-patra-curtin/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-15022023.jpg
END:VEVENT
END:VCALENDAR