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X-WR-CALNAME:Institut de Recherche en Astrophysique et Planétologie
X-ORIGINAL-URL:https://www.irap.omp.eu
X-WR-CALDESC:Évènements pour Institut de Recherche en Astrophysique et Planétologie
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DTSTART;TZID=Europe/Paris:20260924T110000
DTEND;TZID=Europe/Paris:20260924T120000
DTSTAMP:20260909T211558Z
CREATED:20260909T211557Z
LAST-MODIFIED:20260909T211558Z
UID:19609-1790247600-1790251200@www.irap.omp.eu
SUMMARY:Identifying novelty among millions nightly of candidates from the Rubin Observatory
DESCRIPTION:Emille Ishida (LPCA) \n\n\n\n\n\n\n\n\n\nTo fully harness the scientific potential of Rubin data\, we require analysis methods capable of dealing with large data volumes that can identify promising transients within minutes for follow-up coordination. In this talk I will present Fink\, a Rubin community broker developed to face these challenges. Fink is based on high-end technology and designed for fast and efficient analysis of big data streams. More importantly\, it has been designed to answer specific science questions which are unique to different science cases. I will describe how the filters within Fink are constructed and what are the steps necessary to prepare a science module given specific requirements\, which can be from simple cuts to complex machine learning models. I will also describe the lessons learned from ZTF and first outcomes from Rubin data.
URL:https://www.irap.omp.eu/event/identifying-novelty-among-millions-nightly-of-candidates-from-the-rubin-observatory/
LOCATION:Salle de Conférence – IRAP Roche\, 9 avenue du Colonel Roche\, Toulouse\, 31400\, FR
CATEGORIES:Séminaire IRAP
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DTSTART;TZID=Europe/Paris:20261217T110000
DTEND;TZID=Europe/Paris:20261217T120000
DTSTAMP:20260915T074914Z
CREATED:20260915T074913Z
LAST-MODIFIED:20260915T074914Z
UID:19623-1797505200-1797508800@www.irap.omp.eu
SUMMARY:Extreme and Rapid Accretion in Supermassive Black Holes
DESCRIPTION:Claudio Ricci (U. Geneva) \n\n\n\n\n\n\n\n\n\nAccreting supermassive black holes are known to be variable\, changing in brightness across all wavelengths and timescales. In recent years\, a remarkable subset of these Active Galactic Nuclei (AGN) has been discovered to show extreme spectral variability. These changing-look events are thought to arise from extreme and rapid changes in how fast the black hole is feeding\, defying the expected accretion timescales for black holes with masses of millions to billions of solar masses. Such rapid variations provide unique insights into the physics of accretion in supermassive black holes. With the upcoming Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST)\, we expect to uncover thousands of these dramatic transformations\, thanks to its combination of depth and rapid\, repeated imaging of the sky. In this talk\, I will review what we have learned about changing-look AGN so far\, and look ahead to how LSST\, combined with new large-scale spectroscopic surveys such as 4MOST\, will open a new era in our understanding of black hole accretion physics.
URL:https://www.irap.omp.eu/event/extreme-and-rapid-accretion-in-supermassive-black-holes/
LOCATION:Salle de Conférence – IRAP Roche\, 9 avenue du Colonel Roche\, Toulouse\, 31400\, FR
CATEGORIES:Séminaire IRAP
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