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:20200404T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20201003T160000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
DTSTART:20210403T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20211002T160000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+1100
TZOFFSETTO:+1000
TZNAME:AEST
DTSTART:20220402T160000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+1000
TZOFFSETTO:+1100
TZNAME:AEDT
DTSTART:20221001T160000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20210505T150000
DTEND;TZID=Australia/Sydney:20210505T160000
DTSTAMP:20260515T180115
CREATED:20250819T102706Z
LAST-MODIFIED:20250820T021946Z
UID:15002-1620226800-1620230400@www.atnf.csiro.au
SUMMARY:S&A Colloquium: David Gozzard (ICRAR / UWA)
DESCRIPTION:Phase Stabilization for Space Science Applications: from radio telescopes to laser communications\n\nAbstract\n\nThe distribution of high-precision time and frequency signals from atomic clocks is indispensable for many fields of fundamental and applied science. Timescale comparison between atomic clocks enables the highest-precision tests of foundational physics including tests of the General Theory of Relativity\, the variability of fundamental constants\, and searches for dark matter candidates. Radio astronomy\, geodesy\, and global navigation satellite systems also benefit from networks of atomic clocks. In order to fully exploit the precision of the atomic clocks\, the transmission link must be more stable than the atomic clocks themselves. However\, disturbances on the link (thermal effects and vibration\, in the case of an optical fibre\, and atmospheric turbulence\, in the case of a free-space link) cause phase and amplitude noise that greatly degrade the precision of the transmission. \n\n This talk will begin with an overview of stabilized frequency transfer technology developed by the ICRAR-UWA Astrophotonics group to phase synchronize the antennas of the SKA telescope. The talk will then cover how this technology is being translated to stabilize ground-to-space laser links for fundamental science and high-bandwidth laser communications applications. \nWatch recording\nSlides\n\nGozzard_CSIRO2021_v1Download\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-david-gozzard-icrar-uwa/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-05052021-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20210512T150000
DTEND;TZID=Australia/Sydney:20210512T160000
DTSTAMP:20260515T180115
CREATED:20250819T102631Z
LAST-MODIFIED:20250820T032816Z
UID:15001-1620831600-1620835200@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Guillaume Drouart (ICRAR / Curtin)
DESCRIPTION:Toward the first sample of radio powerful AGN in the EOR\n\nAbstract\n\nWith the very recent discovery of radio luminous AGN at z>6\, a new window of opportunity is finally opening in the study of the galaxy evolution at the end of the Epoch of Reionization. Our pilot programme in the 60 deg^2 GAMA-09 field uses a new selection technique taking advantage of the large frequency coverage of GLEAM by selecting compact\, steep and curved sources at low-frequency (70-230MHz). Out of four candidates\, one new powerful radio galaxy\, 0856+0224\, is confirmed at z=5.55\, finally overtaking the z=5.2 20 year-old record for distant radio galaxies (albeit just falling short of the new recent z=5.7 record). Interestingly\, 0856+0224 presents similarities with existing z<5 redshift samples\, giving confidence in the success of our selection technique. Our recent progress on a second source\, 0917-0012\, thanks to the extensive multi-wavelength coverage from follow-up observations with ALMA and JVLA\, supplemented with publicly available data\, place this source at a promising z>5. I will also discuss the refinement of our selection technique over the full 1200 deg^2 sky area covered by the ESO VIKING near-infrared survey\, leading to 55 new high-redshift candidates. This sample aims to provide us with the first statistically significant radio luminous active galactic nuclei sample at z > 6.5 during the Epoch of Reionization. The nature of radio selection presents the advantage of being insensitive to orientation-dependent obscuration\, it allows us (i) to study simultaneously the co-evolution of the supermassive black hole and host galaxy and (ii) to enable the study of the IGM through the HI absorption line. \n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-guillaume-drouart-icrar-curtin/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/png:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-12052021.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20210519T150000
DTEND;TZID=Australia/Sydney:20210519T160000
DTSTAMP:20260515T180115
CREATED:20250819T102603Z
LAST-MODIFIED:20250820T022041Z
UID:15000-1621436400-1621440000@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Lankeswar Dey (TIFR)
DESCRIPTION:Confirming the presence of a supermassive black hole binary in OJ 287 using multi-wavelength observations\n\nAbstract\n\nThe observed quasi-periodic doubly peaked high-brightness flares in the 130-year long optical lightcurve of blazar OJ 287 is best explained by its binary black hole (BBH) central engine model\, where a supermassive secondary black hole (BH) orbits a more massive primary BH in a relativistic eccentric orbit. In this model\, the doubly peaked flares arise due to impacts of the secondary BH with the accretion disk of the primary twice every orbit. This model is successful in predicting the starting time of the last three flares\, and the latest one was observed during August 2019 with the Spitzer space telescope. The observations of these predicted flares strongly suggest the presence of an SMBHB that inspirals due to the emission of nano-Hz gravitational waves (GWs) as the central engine of OJ 287. Additionally\, the high-resolution Very Long Baseline Interferometry (VLBI) observations of OJ 287 reveal that its radio jet’s position angle (PA) exhibits systematic temporal variations. These variations can arise from the precession of the radio jet of OJ 287 due to the binary nature of its central engine. A recent analysis reveals that the BBH central engine model\, primarily developed from the optical observations\, can naturally explain the temporal variations in the radio jet PA of OJ 287\, observed at 86\, 43\, and 15 GHz frequencies. Furthermore\, the ongoing and future Global mm-VLBI Array (GMVA) campaigns on OJ 287 have the potential to firmly establish the validity of our model. These considerations make OJ 287 an excellent candidate for the nascent field of multimessenger nano-Hz GW astronomy\, expected to be inaugurated by the International Pulsar Timing Array (IPTA) consortium during the present decade. \nWatch recording\nSlides\n\nCSIRO OJ 287 seminarDownload\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-lankeswar-dey-tifr/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-19052021.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Sydney:20210526T150000
DTEND;TZID=Australia/Sydney:20210526T160000
DTSTAMP:20260515T180115
CREATED:20250819T102534Z
LAST-MODIFIED:20250820T022241Z
UID:14999-1622041200-1622044800@www.atnf.csiro.au
SUMMARY:S&A Colloquium: Ray Norris (Western Sydney University / CSIRO)
DESCRIPTION:Indigenous Australian Astronomy and Navigation\n\nAbstract\n\nAboriginal people in Australia have a rich astronomical tradition such as the “Emu in the Sky” constellation of dark clouds\, and stories about the Sun\, Moon\, and stars\, revealing a depth and complexity of pre-contact Aboriginal cultures which are not widely appreciated by outsiders. Not only did they know the sky intimately\, but they were familiar with planetary motions\, tides\, and eclipses. Their songs and stories show that Aboriginal Australians sought to understand their Universe in a similar way to modern science. They used this knowledge of the sky to construct calendars\, songlines\, and other navigational tools\, enabling them to navigate across the country\, trading artefacts and sacred stories. \nWatch recording\nSlides\n\nAboriginalAstronomy_50mins_CASS_2021May26Download\n\nEvent details\nDownload iCal\nCategory\nColloquia
URL:https://www.atnf.csiro.au/event/sa-colloquium-ray-norris-western-sydney-university-csiro/
LOCATION:NSW
CATEGORIES:Colloquia
ATTACH;FMTTYPE=image/jpeg:https://www.atnf.csiro.au/wp-content/uploads/2024/12/Colloq-26052021.jpg
END:VEVENT
END:VCALENDAR