High-energy astrophysics · Paris-Saclay
Gamma rays, cosmic rays, neutrinos and gravitational waves reveal the most violent phenomena in nature. We bring these signals together to understand their cosmic origins.
Astro-COLIBRI
Astro-COLIBRI, developed in our group, collects alerts from gamma-ray, neutrino, gravitational-wave, X-ray, optical and radio observatories and puts them in context in real time, for professional and amateur astronomers.
The bigger picture
Combining information carried by particles, light and ripples in spacetime gives us a more complete view of the energetic universe.
High-energy astrophysics is the domain of the most violent and cataclysmic phenomena in the Universe. It covers a large variety of objects at different scales: Galactic sources of high-energy radiation like pulsars and their nebulae, expanding remnants of supernova and binary systems like microquasars. Many extragalactic galaxies are hosting a massive black hole in their center and mass accretion and ejection lead to violent outbursts of these active galactic nuclei.
I am studying these phenomena using information provided by various messengers: electromagnetic radiation (also known as light) up to the highest energies, cosmic rays, neutrinos and gravitational waves. I firmly believe that the combination of these observations has the power to elucidate some of the most persistent mysteries in nature…
Research themes
Instruments and alerts
Radio alerts on fast radio bursts, followed up at very-high energies with H.E.S.S.
Research
Instruments and alerts
Optical and X-ray alerts gathered by Astro-COLIBRI, from SVOM and Einstein Probe to the Rubin Observatory
Instruments and alerts
H.E.S.S. today, CTAO next, and SWGO for a wide-field view of the southern sky
Instruments and alerts
Real-time IceCube alerts, and earlier the ANTARES telescope
Instruments and alerts
LIGO, Virgo and KAGRA alerts, covered with telescope pointings planned by tilepy
Research
Instruments and alerts
The Pierre Auger Observatory, where the group leader's career began
Research
Landmark events
Field notes
Simulations using tilepy show how CTAO can efficiently follow gravitational-wave alerts and detect very-high-energy emission from associated gamma-ray bursts.
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The first H.E.S.S. gamma-ray burst catalog brings together 15 years of follow-up observations, analysis methods and constraints on very-high-energy emission.
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A worldwide campaign combined IceCube alerts with gamma-ray observations to search for the accelerators that produce high-energy cosmic neutrinos.
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Gaia ended its sky-scanning observations in January 2025 after more than a decade, leaving a transformative archive that will shape astronomy for years.
Read articleThe EU-funded ACME project connects European astronomy and astroparticle research infrastructures to strengthen access, tools and collaboration in multi-messenger science.
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Funded by theSupported by the Agence Nationale de la Recherche (ANR, project MOTS), the European Union's Horizon Europe programme (project ACME), the Labex P2IO and the Programme National Hautes Énergies (PNHE).
