French meeting of the Widefield Spectroscopic Telescope
25-27 Mar 2026 Nice (France)

Planning

Wednesday, March 25, 2026

Time Event (+)
13:00 - 13:30 Reception - Reception, badge  
13:30 - 13:50 Introduction & Logistique - Vanessa Hill & Roland Bacon  
13:50 - 15:40 WST Science (+)  
13:50 - 14:15 › ESO's Expanding Horizons process - Jarle Brinchmann, European Southern Observatory  
14:15 - 14:50 › Overview of the Wide-Field Spectroscopic Telescope Concept Study - Roland Bacon, Centre de Recherche Astrophysique de Lyon  
14:50 - 15:15 › WST science drivers: new frontiers of spectroscopic surveys in the 2040s - Vincenzo Mainieri, ESO  
15:15 - 15:40 › The Galactic science case for WST - Vanessa Hill, OCA, Observatoire de la Côte d'Azur, Université Côte d'Azur, CNRS, Laboratoire Lagrange  
15:40 - 16:20 Coffee break  
16:20 - 17:35 WST Science (+)  
16:20 - 16:45 › Defining WST's High-resolution spectrograph setup - Kordopatis Georges, Observatoire de la Côte dÁzur  
16:45 - 17:10 › Galactic ecology from the Gaia era to WST - Alejandra Recio-Blanco, Observatoire de la Cote d'Azur  
17:10 - 17:35 › Hierarchical formation of the Milky Way: Accreted populations - Nicolas Martin, Observatoire astronomique de Strasbourg  
18:00 - 22:30 Bus departure for the Observatory - Heritage tour of the site (the Great Dome, the Grand Meridian, and the Universarium). Buffet under the Great Dome.  

Thursday, March 26, 2026

Time Event (+)
09:00 - 10:40 WST Science (+)  
09:00 - 09:25 › Exploring new frontiers in cosmology with WST - Jean-Paul Kneib, EPFL  
09:25 - 09:50 › Cosmology with cosmic voids in the era of WST - Giulia Degni, Centre de Physique des Particules de Marseille  
09:50 - 10:15 › Cosmology with Lyman-Break Galaxies in light of Stage 5 Spectroscopic Surveys - Constantin Payerne, Institut de Recherches sur les lois Fondamentales de l'Univers  
10:15 - 10:40 › New insights into the first structures in the early Universe with WST - Nicolas Laporte, Laboratoire d'Astrophysique de Marseille  
10:40 - 11:10 Coffee break  
11:10 - 12:50 WST Science (+)  
11:10 - 11:35 › Probing our cosmological model with joint lensing and DESI galaxy clustering - Eric Jullo, Laboratoire d'Astrophysique de Marseille  
11:35 - 12:00 › Kinematic Lensing with the WST Integral Field Spectrograph - Alexandre Jeanneau, Centre de Recherche Astrophysique de Lyon  
12:00 - 12:25 › Synergies between Euclid and WST - Clotilde Laigle, Institut d'Astrophysique de Paris  
12:25 - 12:50 › WST: A Time Domain Machine for the 2040s - Paula Sanchez Saez, European Southern Observatory  
12:50 - 14:00 Lunch  
14:00 - 15:40 WST Science (+)  
14:00 - 14:25 › Multi-messenger observations in the ET era - Susanna VERGANI, Laboratoire d'étude de l'Univers et des phénomènes eXtrêmes, Institut d'Astrophysique de Paris  
14:25 - 14:50 › Preparing WST operations for gravitational wave multi-messenger observations - Sofia Bisero, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France, LUX, Observatoire de Paris, Université PSL, Sorbonne Université, CNRS, 92190 Meudon, France  
14:50 - 15:15 › LSST : news & projection en 2040 - Pierre Antilogus, Laboratoire de Physique Nucléaire et de Hautes Énergies  
15:15 - 15:40 › Looking for gamma-ray bursts afterglows in the Vera C. Rubin observatory data - Johan Bregeon, Laboratoire de Physique Subatomique et Cosmologie de Grenoble  
15:40 - 16:10 Coffee break  
16:10 - 17:00 WST Science (+)  
16:10 - 16:35 › Multimessenger science with WST and LISA - Astrid Lamberts, Observatoire de la Côte d'Azur  
16:35 - 17:00 › Panoramic IFS (MUSE/BlueMUSE) as pathfinders for WST - Johan Richard, Centre de Recherche Astrophysique de Lyon  
17:00 - 18:00 Big Data Round Table  

Friday, March 27, 2026

Time Event (+)
09:00 - 10:40 WST Science (+)  
09:00 - 09:25 › The Extragalactic Science case for WST - Francesco Belfiore, INAF - Osservatorio Astrofisico di Arcetri, European Southern Observatory  
09:25 - 09:50 › A redshift z~1 WST reference survey - Nicolas Bouché, Centre de Recherche Astrophysique de Lyon  
09:50 - 10:15 › WST as a CGM mapping machine across cosmic time - Floriane Leclercq, Centre de Recherche Astrophysique de Lyon  
10:15 - 10:40 › Unsupervised classification of spaxels from MUSE to WST - Hugo Chambon, Institut de Planétologie et d'Astrophysique de Grenoble  
10:40 - 11:10 Coffee break  
11:10 - 12:50 WST Science (+)  
11:10 - 11:35 › Unveiling the hot and energetic UNiverse in X-ray with NewAthena and X-IFU - Etienne Pointecouteau, Institut de recherche en astrophysique et planétologie  
11:35 - 12:00 › Synergie WST - SKAO - Chiara Ferrari, Laboratoire Lagrange  
12:00 - 12:25 › MOSAIC at the ELT: a unique multi-object spectrograph for the largest ground-based telescope - Thierry Contini, Institut de recherche en astrophysique et planétologie  
12:25 - 12:50 › Managing the environmental sustainability of WST - Shan Mignot, Laboratoire Lagrange  
12:50 - 13:00 Concluding Remarks - R. Bacon  
13:00 - 14:30 Lunch  
  
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