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09/02/2026, 09:00
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09/02/2026, 09:30
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09/02/2026, 09:45
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Rodrigo Angulo (Johns Hopkins University)09/02/2026, 10:00
Cassiopeia A is a well-studied supernova remnant and one of the youngest remnants in the Milky Way with the supernova occurring in the late 1600s. First infrared (IR) echoes (Krause et al. 2005) and then scattered light echoes of Cas A were found (Rest 2008), which revealed that the supernova was a type IIb (Krause et al. 2008). Further analysis of the IR echoes showed that the EUV-UV...
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Zachary Lane (University of Canterbury)09/02/2026, 10:20
Shock breakout and, in some cases, jet-driven high-energy emission are increasingly recognized as key signatures of the earliest phases of core-collapse supernovae, especially in Type IIn systems due to their dense, interaction-dominated circumstellar environments. We present a comprehensive photometric analysis of SN$\,$2019vxm, a long-duration, luminous Type IIn supernova,...
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Conor Ransome (Steward Observatory, University of Arizona)09/02/2026, 11:00
Supernovae that interact with nearby circumstellar material shed by the progenitor shortly before the terminal explosion shed light on the late lives of massive stars. These objects are highly heterogeneous, with early observations shedding light on even more diversity. We present SN2025ngs, a nearby interacting supernova in NGC5961. SN2025ngs has a spectroscopic evolution almost mimicking...
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09/02/2026, 11:20
A bright, z = 1.95 supernova (SN) was discovered in JWST/NIRCam imaging acquired on 2023 November 17. The SN is quintuply imaged as a result of strong gravitational lensing by a foreground galaxy cluster, detected in three locations, and remarkably is the second lensed SN found in the same host galaxy. The previous lensed SN was called “Requiem,” and therefore the new SN is named “Encore.”...
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David Coulter (JHU/STScI)09/02/2026, 11:40
On September 1, 2025 the Vast Exploration for Nascent, Unexplored Sources program (VENUS) discovered a multiply-imaged supernova (SN) in JWST imaging of the galaxy cluster, MACS1931 (z~0.35). At the site of the lensed images, contemporaneous VLT/MUSE data show Lyman alpha emission from the host, placing the lensed sytem at a spectroscopic redshift = 5.13. We dub this candidate SN Eos – named...
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Armin Rest (STScI)09/02/2026, 13:00
The James Webb Space Telescope (JWST) is the most complex and sensitive space observatory ever deployed, combining revolutionary engineering with unprecedented scientific capability. With its segmented 6.5-meter primary mirror and suite of infrared instruments, JWST enables observations of the Universe with extraordinary sensitivity and angular resolution. In this talk, I will discuss the key...
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Jaime Luisi (University of Canterbury)09/02/2026, 13:20
Fast infrared transients have not been well explored; however, we now have chance to search this parameter space. With creative analysis techniques, we are using the James Webb Space Telescope (JWST) to search for transients with lifetimes from seconds to minutes. A single exposure from JWST is made up of integrations that are a combination of numerous non-destructive reads. This means that a...
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Manisha Shrestha09/02/2026, 13:40
Massive stars produce the building blocks of life on Earth, such as carbon and oxygen. However, we still do not understand the physical processes responsible for the production of elements heavier than iron, such as gold, via rapid neutron-capture nucleosynthesis (r-process). The first-ever kilonova associated with the gravitational wave event GW170817 demonstrated that binary neutron star...
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Charles Kilpatrick (Northwestern)09/02/2026, 14:00
Every year, dozens of core-collapse supernovae are discovered in nearby galaxies with deep pre-explosion imaging that can be used to detect or place strong limits on the physical nature of their massive star progenitor systems, providing a direct connection between stars and their cataclysmic explosions observed throughout the Universe. I will discuss recent results from the Hubble and James...
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Melissa Shahbandeh (Space Telescope Science Institute)09/02/2026, 14:20
Supernovae are the ultimate beacons of the time domain universe, signaling the cataclysmic end of massive stars and acting as the cosmic alchemists that forge the building blocks of galaxies. As the world of astronomy changes through the arrival of large survey datasets and advanced space based observatories, we are finally able to resolve long standing questions regarding the origin and...
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Conor Larison (STScI)09/02/2026, 14:40
The discovery of the strongly lensed supernova (SN) Refsdal in 2014, and the subsequent measurement of the Hubble constant (H0) from its predicted reappearance, marked a new era in time-delay cosmography. Since 2014, strongly lensed SNe have been discovered at a rate of <1 event per year, but the field has been revolutionized with the arrival of JWST. The Cycle 4 Vast Exploration for Nascent,...
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Michael Albrow (University of Canterbury)09/02/2026, 15:20
The GBTDS is one of the three core community surveys to be undertaken during the first five years after launch of the Nancy Grace Roman Space Telescope. Its primary purpose is the detection of Milky Way exoplants by microlensing and transits. However, the survey cadence and area make it useful for extragalactic science, with the obvious caveats of extinction and stellar crowding in the...
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Matthew Siebert (Space Telescope Science Institute)09/02/2026, 15:40
The Nancy Grace Roman Space Telescope will provide a revolutionary measurement of evolving dark energy out to z < 3. The accuracy of this measurement is predicated on the assumption that Type Ia supernova (SN Ia) luminosities do not evolve with redshift. If present, SN Ia luminosity evolution is expected to be most detectable in the dark matter–dominated era of the Universe (z > 1.5); its...
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Matthew Siebert (Space Telescope Science Institute)09/02/2026, 15:40
Despite using Type Ia supernovae (SNe Ia) to precisely measure cosmological parameters, we do not know basic facts about the progenitor systems and explosions. Theory suggests that SN Ia progenitor metallicity is correlated with peak luminosity, but not how quickly it fades, which we use to calibrate the luminosity and measure distances. This effect should lead to an increased Hubble scatter,...
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Ryan Ridden (University of Canterbury)09/02/2026, 16:00
In the last seven years TESS has given us a unique window into the dynamic universe. While intended for exoplanet discovery this telescope has observed all variety of transient and variable across the sky. Over its lifetime TESS has imaged the sky at cadences ranging from 30 minutes to just 200 seconds. In this talk I will give an overview of the time domain science possible with TESS, and...
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Hugh Roxburgh (Curtin University)09/02/2026, 16:20
The Transiting Exoplanet Survey Satellite (TESS) has been operating for nearly eight years, repeatedly surveying the entire sky with cadences no slower than 30 minutes. This has produced an enormous, largely unexplored time-domain data set. Using the TESSELLATE pipeline, we can blindly extract transient events on timescales from 200 seconds to four weeks, opening a new window on rapidly...
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Clarinda Montilla (University of Canterbury)09/02/2026, 16:40
For the first time ever, it is possible to obtain well sampled light curves of fast transients, with a plethora of data provided by a range of telescopes. In particular, TESS has a uniquely fast cadence that allows us to observe transients during the rise a, and decay after peak brightness. With detailed light curves built from both high cadence and multi wavelength data, understanding the...
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Mr Koji Shukawa (JHU)09/02/2026, 17:00
Over the past seven years, TESS has provided an unprecedented high-cadence view of the transient universe, yet its scientific potential is currently limited by significant correlated noise and reduction artifacts. These challenges, specifically complex time-varying backgrounds, spacecraft pointing drift, and pixel sensitivity variations, frequently hide the subtle light curve signatures...
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Chris Martin (Explorative Science Foundation)10/02/2026, 10:00
GUSTO (Galactic/Extragalactic Spectroscopic Terahertz Observatory) is a NASA Mission of Opportunity balloon mission which successfully flew for 55 days in early 2024 high over Antarctica. GUSTO carried out fully sampled large-area observations of two key fine structure lines - [NII] 3P1-3P0 and [CII] 2P3/2-2P1/2 over a 62 square degree area of the galactic plane with a velocity resolution...
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David Coulter (JHU/STScI)10/02/2026, 10:20
Detecting transients requires repeated imaging of the same region of the sky to search for the presence of a new object in the resulting "difference image". With the exception of the Euclid Deep Survey (EDS), there is no planned repeated Euclid imaging. As a result, transient searches will not be feasible in the Euclid Wide Survey (EWS), and the same could true of the Roman High Latitude Wide...
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Rodrigo Angulo (Johns Hopkins University)10/02/2026, 10:40
The Great Eruption (GE) of Eta Car in the mid-1800s was a spectacular astronomical event, visible to the naked eye (Smith & Frew 2011). It’s the proto-type of eruptive mass loss, luminous blue variables, and supernova impostors. Prior to the discovery of light echoes, the only observations of Eta Car's historical eruption were visual estimates of its brightness and approximate colors. Light...
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Jeff Cooke (Swinburne University)10/02/2026, 11:00
The Deeper, Wider, Faster (DWF) program has grown to coordinate over 100 telescopes located on every continent and in space operating at all wavelengths (radio, mm, IRm optical, UV, X-ray and gamma-ray) and includes particle detectors (and gravitational waves, when operating) to search for and study fast transients (those with millisecond-to-day durations). DWF was developed in 2014 and was...
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Gautham Narayan (University of Illinois at Urbana-Champaign)10/02/2026, 11:20
We are living through parallel revolutions in time-domain astrophysics and artificial intelligence. Within a year of beginning operations, the Vera C. Rubin Observatory will find more transient sources than all previous surveys combined. We will be able to use these cosmic lighthouses as beacons to map how stellar populations evolve with redshift, how feedback from their deaths impacts their...
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Dylan Magill (Queen's University Belfast)10/02/2026, 11:40
The Vera C. Rubin Observatory’s 10-Year Legacy Survey of Space and Time (LSST) is expected to revolutionise time-domain astronomy, with a hundredfold increase in detected transients. For tidal disruption events (TDEs) in particular, this will increase the population of observed objects from ~100 to ~30,000. As TDEs are a relatively recent discovery with a small catalogue of objects, many...
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Brayden Leicester (University of Canterbury)10/02/2026, 13:00
The number of low Earth orbit (LEO) satellites is increasing, and they are having a noticeable impact on the quality of a large range of astronomical data. We use archival data from the Multi Unit Spectrographic Explorer (MUSE) to quantify the effects of satellites on the datacubes. MUSE is an integral field unit (IFU) so it captures a spectrum at every pixel in the field of view. Using the...
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Mike Engesser (STScI)10/02/2026, 13:20
JWST affords us the opportunity to test our cosmological models and understanding of stellar physics by observing supernovae at high-redshift. Specifically, type Ia supernovae are understood to be “standardizable candles”, an assumption which underlies some of our best cosmological distance measurements. However, it is possible that globally evolving properties, such as metallicity, could...
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Justin Pierel10/02/2026, 13:40
The Abell 370 galaxy cluster is famous for housing the first identified strongly lensed galaxy. The cluster was recently observed by several JWST programs, revealing two supernovae (SNe) that we followed-up with additional JWST imaging and spectroscopy. The first is SN Typhon, a quadruply-imaged, core-collapse SN at z=1.9 with a remarkable rest-frame UV light curve of each of its images from...
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Jan Eldridge (University of Auckland)10/02/2026, 14:00
Over the last 20 years the Binary Population and Spectral Synthesis code has been used to constrain transients through multiple comparisons between theory and observations. For example, resolved supernova progenitors, long-GRB afterglow properties, resolved and unresolved stellar population at supernova and kilonova sites, synthetic supernova lightcurves, and gravitational wave transient rate...
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Ms Erin Eastep (University of Auckland)10/02/2026, 14:20
We present a study using the Binary Population and Spectral Synthesis code (BPASS) that predicts the Galactic population of binaries that contain a black hole or neutron star. By incorporating the stellar evolution models from the BPASS suite with a Milky Way analogue galaxy from the Feedback in Realistic Environment (FIRE) simulation suite, we can generate a theoretical population of...
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Prof. David Wiltshire (University of Canterbury)10/02/2026, 14:40
The timescape cosmology returns to first principles, with quasilocal gravitational energy replacing dark energy, to explain apparent cosmic acceleration. As inhomogeneities grow, they back react on average cosmic expansion, which differs from conventional FLRW models. Crucially, dynamical spatial curvature arises as time-varying gradients of the kinetic energy of expansion, and depends...
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Matthew Hopkins (University of Canterbury)10/02/2026, 15:20
Fast radio bursts (FRBs) are transient radio events with millisecond-scale durations and debated origins.
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Collisions between planetesimals and neutron stars are one proposed mechanism to produce FRB-like signals, with the planetesimal's strength, size and density determining the time duration and energy of the resulting event. One under-explored source of these planetesimals is the... -
Kavya Shaji (University of Sydney)10/02/2026, 15:40
The radio sky is highly dynamic, hosting transient and variable sources on timescales from milliseconds to years. In this talk, I will present an overview of the work of the Sydney Radio Transients Group, focusing on the discovery and characterisation of radio transients across a wide range of timescales. Our science spans fast radio bursts, radio afterglows of gravitational-wave events, and...
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Stuart Ryder (Macquarie University)10/02/2026, 16:00
Fast radio bursts (FRBs) are energetic pulses of radio emission typically lasting a few milliseconds, which encode in their telltale parabolic sweeps in time and frequency a fossil record of their passage through ionised gas between and within galaxies. The Commensal Real-time ASKAP Fast Transients (CRAFT) survey was the first to localise a non-repeating FRB to sub-arcsecond precision, and has...
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Tarraneh Eftekhari (Northwestern University)10/02/2026, 16:20
The last decade of investigations into the extragalactic radio sky has led to a paradigm shift, with all-together new and uncharacterized populations of radio transients emerging for the first time. Upgrades in multiple fast radio burst (FRB) experiments have led to the first samples of precisely localized events, enabling host galaxy associations and detailed observations of the immediate...
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Joshua Goodeve (McGill University)10/02/2026, 16:40
The Canadian Hydrogen Observatory and Radio Transient Detector (CHORD), currently under construction, will be an important complement to the highly successful CHIME array, and is a flagship project of Canadian radio astronomy. CHORD may have excellent capabilities as a detector of transient phenomena on day to year timescales, including TDEs, GRBs, AGN flares and more. In this talk, I will...
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10/02/2026, 18:30
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Jeff Cooke (Swinburne University)11/02/2026, 09:30
The Keck Wide-Field Imager (KWFI) is a 1 degree UV-optimised optical prime focus imager for the Keck telescopes. KWFI will fill several large wide-field imaging capability gaps that exist now and will will be critically needed with the recent and upcoming billion-dollar 'mega-facilities' operating at all wavelengths and messengers. For example, KWFI will provide very deep (m ~ 28-30)...
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David Buckley (South African Astronomical Observatory)11/02/2026, 09:50
I will review plans for global transient and detection networks of the future. The BRICS+ astronomy flagship programme entitled the BRICS Intelligent Telescope and Data Network (BITDN) aims to harness existing and future facilities within BRICS+ countries for automated transient observation. Likewise a smaller Africa initiative, the African Integrated Observation Network (AIOS) has similar...
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12/02/2026, 19:00
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Joshua Goodeve (McGill University)
The Canadian Hydrogen Observatory and Radio Transient Detector (CHORD), currently under construction, is the successor to the highly successful CHIME array, and is a flagship project of Canadian radio astronomy. Though not an original design goal, CHIME was found to be an immensely capable detector of Fast Radio Bursts, and CHORD may have unforeseen capabilities in the same spirit, as a...
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Michael Albrow (University of Canterbury)
I will give an introduction to microlensing and describe the KMTNet survey, a high-cadence photometric survey of the Milky Way Bulge. From this survey, and over the last decade, we have detected ~ 25,000 microlensing events using our telescopes in Siding Spring, CTIO and SAAO. I will discuss observational features of the survey, what we have learned about the Galactic population of cool...
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