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    S'authentifier

    Paris-Saclay Astroparticle Symposium 2026

    → Europe/Paris
    Institut Pascal

    Institut Pascal

    Rue André Rivière 91400 Orsay
    Description

    Week 1: October 26 - October 30 : Mysteries of the Dark Universe

    Week 2: November 2 - November 6 : ACME Workshop: The Transient Universe in the Rubin Era

    This is the second ACME workshop. It will will focus on upcoming observations by the Rubin Observatory and their connection to the multi-wavelength and multi-messenger sky. In this context, several observatories will be presented, and current results as well as future prospects for observing a variety of transient sources will be discussed. The workshop will also provide information on tools that can help coordinate efforts to observe the transient sky.

    Abstract submission will open on June 1, 2026 and close on July 31, 2026. Registration will also open on June 1 and remain available until October 1, 2026. The meeting will be held in a hybrid format, and limited funding support will be available for some participants. There is no registration fee.

    Please note that registration on the ScienceConf website is mandatory to participate in the ACME workshop, using the following link: ACME conference: The Transient Universe in the Rubin Era - Sciencesconf.org

    Week 3: November 9 - November 13 : Open Alerts and Open Data

    This workshop will focus on the tools and practices that enable efficient access to and exploitation of modern astrophysical data. The first part will feature discussions on alert brokers features, highlighting their filtering capabilities and scientific modules for transient astronomy. The second part will be dedicated to open data in astroparticle physics, with discussions on current practices and the challenges of making data more accessible across the particle physics and astrophysics communities.

    • 9–10 November: hands-on workshops and tutorials on brokers' filters and scientific modules.
    • 11 November : French holiday (free time in Paris/Orsay)
    • 12–13 November: presentations on open data practices in various fields related to our themes.

     

    Scientific Organizing Committee

    • Xavier BERTOU (IJCLab)
    • Jonathan BITEAU (IJCLab)
    • Philippe BRAX (CEA)
    • François BRUN (CEA)
    • Yann MAMBRINI (IJCLab)
    Contact
    Inscription
    Conférence grand public par Christophe Galfard le mardi 10 novembre à 18h30
    Inscription
    Participants
    75 Voir la liste complète
    Enquêtes
    Participants Satisfaction Survey
    Répondre
    • lun. 26 octobre
      • 09:00 → 11:00
        Registration + Discussions 2h
      • 11:00 → 12:00
        H0 tension 1h
        Orateur: Vivian Poulin
        H0_world_cup_symposium.pdf
      • 12:00 → 14:00
        Welcome Lunch at the Cathedral 2h
      • 14:00 → 15:00
        Physics and simulations of scalar dark matter around black holes 1h
        Orateur: Katy Clough
        SaclayAstro.pdf
      • 15:00 → 16:05
        Discussions 1h 5m
      • 16:05 → 17:05
        Cosmology with CMB and space-based galaxy surveys. Status and prospects 1h
        Orateur: Giulio Fabbian
        fabbian_astroparticle_saclay_2026.pdf
      • 17:05 → 19:30
        Discussions 2h 25m
    • mar. 27 octobre
      • 09:00 → 11:00
        Discussions 2h
      • 11:00 → 12:00
        Primordial Black Holes from Cosmology 1h
        Orateur: Tom Giblin
        Giblin_Paris-Saclay_2026.pdf
      • 12:00 → 14:00
        Lunch 2h
      • 14:00 → 15:00
        Growth of supermassive black holes in the era of JWST and nanograv, do they need new physics? 1h
        Orateur: Malcom Fairbairn
        orsay2026fairbairn.pdf
      • 15:00 → 17:00
        Discussions 2h
      • 17:00 → 19:00
        Beer and Chips at the Cathedral 2h
    • mer. 28 octobre
    • jeu. 29 octobre
      • 09:00 → 11:00
        Discussions 2h
      • 11:00 → 12:00
        Quadratic couplings and dark matter 1h
        Orateur: Claire Burrage
        Burrage_Saclay_2026 (1).pdf
      • 12:00 → 14:00
        Lunch 2h
      • 14:00 → 15:00
        Discussion: Discussion on Artificial Intelligence
      • 15:00 → 16:00
        Perspective on black holes and gravitational waves 1h
        Orateur: Juan Garcia-Bellido
        AstroParticle_Paris_29Oct2026_JGB.pdf
      • 16:00 → 18:00
        Discussions 2h
    • ven. 30 octobre
      • 09:00 → 11:00
        Discussions 2h
      • 11:00 → 12:00
        Looking for new physics via CMB and GWs 1h
        Orateur: Nicola Bartolo
      • 12:00 → 14:00
        Lunch 2h
      • 14:00 → 17:00
        Discussions 3h
    • lun. 9 novembre
      • 09:00 → 09:10
        Introduction 10m
        Orateur: Jonathan Biteau (Université Paris-Saclay, CNRS/IN2P3, IJCLab)
      • 09:10 → 09:40
        Overview of brokers - Fink how to Julien Peloton 30m
        Orateur: Julien Peloton (CNRS-IJCLab)
      • 09:40 → 10:10
        Overview of platforms - AstroColibri how to Ilja Jaroschewski 30m
        Orateur: Ilja Jaroschewski (CEA - IRFU - DPhP)
      • 10:10 → 10:30
        Open questions 20m
      • 10:30 → 11:00
        Coffee break 30m
      • 11:00 → 12:30
        Mini-projects: Presentation
      • 12:30 → 14:00
        Lunch Buffet 12:30 - 14:00 1h 30m
      • 14:00 → 16:00
        Hands-on work
      • 16:00 → 16:30
        Coffee break 30m
      • 16:30 → 18:30
        Hands-on work
      • 18:30 → 20:00
        Beers/soda and chips 1h 30m
    • mar. 10 novembre
      • 09:00 → 10:20
        Examples of project implementations
        • 09:00
          Extreme states of blazars 20m
          Orateur: Julian Hamo (IJCLab)
        • 09:20
          Public GRB follow-up schedule 20m
          Orateur: Bernardo Cornejo Avila (CEA IRFU/DPhP)
        • 09:40
          AstroColibri TBD 20m
          Orateur: Ilja Jaroschewski (CEA - IRFU - DPhP)
        • 10:00
          Hunting contaminants for fast transients 20m
          Orateur: M. Roman Le Montagner (IJCLab)
      • 10:20 → 10:50
        Coffee break 30m
      • 10:50 → 12:30
        Hands-on work
      • 12:30 → 14:00
        Cantine 12:30 - 14:00 1h 30m
      • 14:00 → 16:00
        Hands-on work
      • 16:00 → 16:30
        Coffee break 30m
      • 16:30 → 18:15
        Mini-projects: Reports
      • 18:30 → 20:00
        Beers/soda and chips 1h 30m
      • 18:30 → 20:30
        Conference Grand Public : "Voyage vers l’Infini", Christophe Galfard 2h
    • jeu. 12 novembre
      • 09:30 → 10:00
        Open data workshop welcome and registration 30m
      • 10:00 → 10:30
        Community-driven best-practice recommendations for Open Science in High-Energy Physics 30m
        Orateur: Kati Lassila-Perini (CERN)
      • 10:30 → 11:00
        Open Data from the CMS Experiment at the LHC 30m

        Since 2014, CMS has regularly released research-quality collision data and simulation, software and documentation to the public via the CERN Open Data Portal. These data have found extensive use in educational programs as well as in the larger research community. This talk will describe the content of CMS Open Data and how it has been used and its impact. It will also explore the challenges and opportunities ahead for data preservation and open access in CMS.

        Orateur: Thomas McCauley (University of Notre Dame)
      • 11:00 → 11:30
        Coffee break 30m
      • 11:30 → 12:00
        Combining Neutrino Experiments: From Oscillations to Interactions, and the Role of Open Data 30m

        Neutrino oscillation physics is entering a precision era: current and future experiments are set to determine the neutrino mass hierarchy and probe charge-parity violation in the lepton sector. Combining data across experiments offers a faster and more robust route to discovery, while also testing the consistency between them. One of the dominant uncertainties in oscillation measurements comes from our understanding of neutrino interactions with nuclei, so combining cross-section measurements from experiments operating at different energies and on different target materials is equally important. I will review approaches to combining both oscillation and cross-section data, their challenges, and the public data releases needed to make them possible in the first place. I will then present another route: MINERvA’s Open Data Product, a first-of-its-kind public data release in accelerator neutrino physics, analogous to the open-data archives of collider experiments. I will discuss the challenges of building such a release, its impact on the field so far, and how open data can help the community address uncertainties shared between experiments.

        Orateur: Anezka Klustova (Imperial College)
      • 12:00 → 12:30
        DMDC (Heerak Banerjee) 30m
      • 12:30 → 14:00
        Lunch at Cathedrale 1h 30m
      • 14:00 → 14:30
        Data Formats for Gamma-ray Astronomy (Maximilian Linhoff) 30m
      • 14:30 → 15:00
        The opening up of data from the Pierre Auger Observatory: an ever-evolving journey 30m

        In 2001, the first detectors of what would become the Pierre Auger Observatory recorded their first cosmic-ray events in the Pampa Amarilla, Argentina. Over the following 25 years, the Observatory has continuously evolved in its instrumentation, analysis methods, scientific results, and scope. The Collaboration's mindset has evolved too, embracing new scientific perspectives and, more recently, the growing importance of open science and open data.
        The principle of making data publicly available was already included in the founding documents of the Collaboration and formalised in a data-release policy in 2006. This led to the first public release of 1% of the cosmic-ray data in 2007, primarily intended for dissemination and educational purposes. Yet it took another 14 years before a more substantial release (10%), designed to enable independent scientific analyses, became a reality in 2021.
        In this presentation, I will retrace this evolution, discussing not only the technical challenges of making Auger data accessible and usable outside the Collaboration, but also the cultural obstacles that delayed their release. I will illustrate how the experience gained has progressively changed the Collaboration's attitude towards data openness, paving the way for the forthcoming 30% release and broader access to Auger data through the European ACME initiative.
        Rather than presenting Open Data as a succession of increasingly large releases, I will describe an evolving process of learning, adaptation, and changing perspectives within a large scientific collaboration, including the lessons drawn from the scientific use of the publicly released data.

        Orateur: Piera Luisa Ghia (IJCLab, IN2P3, CNRS)
      • 15:00 → 19:30
        Discussion and free office time 4h 30m
      • 18:30 → 20:00
        Conférence grand public: "Lumière et obscurité dans l'histoire de l'univers", Hervé Dole
      • 19:30 → 22:00
        Workshop dinner at Le Gramophone 2h 30m
    • ven. 13 novembre
      • 09:30 → 10:00
        The CTAO Open Science Data Challenge 30m

        The CTAO Open Science Data Challenge will be the first Science Data Challenge (SDC) organised by the Cherenkov Telescope Array Observatory (CTAO) open to the whole science community. In this talk, I will present the preparatory work that has been done on the SDC, and the opportunities that the SDC will provide to the community for gaining familiarity with data analysis tools, as well as for getting a first understanding of the broad range of scientific topics that CTAO will explore.

        Orateur: Stefano Marchesi (INAF)
      • 10:00 → 10:30
        Open Science Projects in Neutrino Physics 30m

        This talk will highlight two open science initiatives that we have launched in neutrino physics.

        The first part will focus on the IceCube Kaggle Competition. I will discuss the motivation behind the project, its organisation and execution, the outcomes and impact of the competition, and plans for a possible future Kaggle challenge.

        The second part will present an open-source, open-data framework for global fits in neutrino physics. The project combines data from multiple experimental collaborations within a common fitting framework, enabling transparent and reproducible analyses. I will discuss the scientific motivation, technical implementation, and selected physics results that have emerged from this effort.

        Orateur: Philipp Eller (TU Munich)
      • 10:30 → 11:00
        Coffee break 30m
      • 11:00 → 11:30
        Firmamento: a web platform for high-energy and multi-messenger astrophysics 30m

        Firmamento (https://firmamento.space) is a web-based data retrieval and analysis platform dedicated to multi-frequency/multi-messenger cosmic sources.
        Besides giving access to imaging, spectral, and timing astronomical data, as well as literature information, Firmamento provides Value-Added products and AI-Assisted special tools to support a very wide community of users, including citizen scientists and the general public.
        The tools that are most relevant to the astroparticle community are:
        - the Error Region Counterpart Identifier (ERCI), a tool used for the association of blazars with IceCube neutrinos, the generation of the 1 FLAT and the 2FLAT Fermi-LAT catalogs and the BReRASS e-Rosita blazar sample.
        - Galactic-absorption-corrected SEDs, built using data from over 100 local and remote catalogs and databases, as well as data products generated from Firmamento and MMDC (https://mmdc.am) pipeline processing of archival data from Swift-XRT, Swift-UVOT, NuSTAR and Fermi-LAT.
        - Machine learning and algorithmic tools to characterise the SEDs by estimating crucial parameters like nu_peak_S, nu_peak_HE, Peak ratios, Compton dominance etc.
        - Flux extrapolation to VHE and MeV bands with detectability prospects for upcoming or planned telescopes.
        - Redshift estimation from about 20 catalogs and web services such as SDSS-dr20, DESI-dr1, NED, SIMBAD etc. as well as direct photometric estimation via SED data comparison with host galaxy or blue-bump plus IR torus templates.
        - SED comparison with SED templates of stars, galaxies blazars etc.
        In my presentation I will give a brief overview of Firmamento’s capabilities and examples of recent results.

        Orateur: Paolo Giommi
      • 11:30 → 12:00
        MMODA (Andrii Neronov) 30m
      • 12:00 → 12:30
        Beyond the exclusion curve: open data and reinterpretation tools in XENONnT 30m

        Direct detection experiments usually publish their results as exclusion curves for a few benchmark models, which limits how others can reuse them. In XENONnT, we accompany key results, whenever possible, with public data releases on GitHub, archived with a DOI on Zenodo. I will present what these packages typically contain, such as background and signal templates, detector-response models, published limits and reinterpretation tools, and how theorists and experimentalists can use them to test new models or assumptions. I will conclude with some lessons learned from this experience.

        Orateur: Maxime Pierre (Nikhef)
      • 12:30 → 14:00
        Lunch 1h 30m
      • 14:00 → 14:30
        TeVCat 30m
        Orateur: Deirdre HORAN (LLR / Ecole Polytechnique / CNRS / IN2P3)
      • 14:30 → 15:00
        Masterclass CERN 30m
        Orateur: Yasmine Amhis (IJCLab)
      • 15:00 → 18:00
        Discussion and free office time 3h