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Prof. Peter Brown (Texas A&M University)27/03/2025, 11:30Invited talk
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Hui Sun (National Astronomical Observatories, Chinese Academy of Sciences)27/03/2025, 12:00Contributed talk
Massive stars end their life as core-collapse supernovae, amongst which some extremes are Type Ic broad-lined supernovae associated with long-duration gamma-ray bursts (LGRBs) having powerful relativistic jets. Their less-extreme brethren make unsuccessful jets that are choked inside the stars, appearing as X-ray flashes or low-luminosity GRBs. On the other hand, there exists a population of...
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Dr Wynn Jacobson-Galan (California Institute of Technology)27/03/2025, 12:15Contributed talk
There is now an amalgam of observational evidence that massive stars undergo enhanced and/or eruptive mass-loss in their final years before explosion. In this talk, I will present multi-wavelength observations of >40 type II SNe whose very early-time ("flash") spectra showed transient, narrow emission lines from shock interaction with confined circumstellar material (CSM) around their red...
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Prof. Chris Kochanek (Department of Astronomy, The Ohio State University)27/03/2025, 14:30Invited talk
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Daniel Perley (Liverpool John Moores University)27/03/2025, 14:50Contributed talk
The rare and mysterious class of events sometimes known as luminous fast blue optical transients (LFBOTs), typefied by the event AT2018cow, has provided a steady stream of surprises over the past seven years. LFBOTs radiate primarily in the UV, are extremely radio-luminous, are highly X-ray variable, and at least in some cases they produce ultra-fast optical flares for months and leave behind...
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Nabeel Rehemtulla (Northwestern University)27/03/2025, 15:05Contributed talk
Despite great advances in our understanding of transients over the ~20 years of Swift operations, it remains extremely challenging to link a transient to a progenitor with certain properties and to constrain the final phases of its life. Very early follow-up of supernovae (SNe), however, can provide critical insights into the progenitor: flash spectroscopy can reveal short-lived CSM...
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Brendan O'Connor (Carnegie Mellon University)27/03/2025, 15:20Contributed talk
We present the results of our multi-wavelength (X-ray to radio) follow-up campaign of the Einstein Probe transient EP240408a. The initial 10 s trigger displayed bright soft X-ray (0.5-4 keV) radiation with a peak luminosity of 1e49 (1e50) erg/s for an assumed redshift of z=0.5 (2.0). The Neil Gehrels Swift Observatory and Neutron star Interior Composition ExploreR discovered a fading X-ray...
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Qinyu Wu (National Astronomical Observatories, Chinese Academy of Sciences)27/03/2025, 15:35Contributed talk
Extragalactic Fast X-ray Transients (eFXTs) are defined as short flares in X ray with cosmological origins. But the nature of eFXT is still uncertain due to the lack of timely follow up observations. The possible physical mechanisms include the shock breakout of a supernova, the fireball phase of a nova, the magnetar powered X-ray emission after the mergers of binary neutron stars, off-axis...
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Prof. Raffaella Margutti (UC Berkeley)27/03/2025, 15:50Invited talk
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