IRFU

The French Alternative Energies and Atomic Energy Commission (Commissariat à l’Énergie Atomique et aux Énergies Alternatives, CEA), is a public government-funded research organization. The Institute of Research on the Fundamental Laws of the Universe (IRFU), of the Fundamental Research Division (DRF) of CEA, brings together three scientific disciplines, astrophysics, nuclear physics and particle physics, as well as all the associated technological expertise. It gathers 200physicists, 300 engineers, and 170 technicians and produces around 800 publications per year. The multi-messenger platform at IRFU has expertise in a large variety of instruments, cosmic messengers and data analysis techniques.

Main contact for TNA call: Fabian Schussler

Available expertise

Within ACME, the multi-messenger platform at IRFU offers expertise on data analysis of the high energy and very high energy gamma-ray instruments Fermi, H.E.S.S. and CTA. IRFU scientists are experts in using the analysis tools designed for the data of these instruments. The multi-messenger platform at IRFU also offers expertise on the observation planning of VHE instruments, in the case of steady sources as well as in the particular context of transient follow-ups. As such, IRFU scientists can provide support on the elaboration of observation strategies and on the associated observation proposals. In addition, IRFU offers expert support on the use and integration of the Astro-COLIBRI platform that provides real-time information on transient and multi messenger phenomena. IRFU scientists are members of the Fermi-LAT, H.E.S.S. and CTA collaborations. Further MWL expertise is provided by members of the institute who are leading members of various collaborations including SVOM, INTEGRAL, XMM-Newton, JWST, NenuFAR, ANTARES, etc.

Available tools and software

Fermi-LAT Analysis Tools and Catalogs

The Fermi-LAT analysis tools support the analysis of GeV gamma-ray data, including likelihood analysis, sky mapping, spectral analysis, and variability studies. Fermi-LAT data and source catalogues can also be used in multi-wavelength and multi-instrument studies,...

CTApipe

CTApipe is a Python framework for the calibration and reconstruction of imaging atmospheric Cherenkov telescope data, including image parameterisation and event reconstruction. Its modular structure supports the development and comparison of different reconstruction...

H.E.S.S. analysis tools

IRFU and LUX can provide expertise on H.E.S.S. data analysis tools, such as ParisAnalysis, and HAP.

Gammapy

Open-source Python package for analysing very-high-energy gamma-ray data.…

Tilepy

Multimessenger events like gravitational waves (GW), gamma-ray bursts (GRB), high-energy neutrinos, etc. offer unique opportunities for astroparticle physics. While carrying extremely useful information, searches for associated electromagnetic emissions are...

Astro-COLIBRI

Astro-COLIBRI is an advanced real-time research infrastructure for time-domain and multi-messenger astrophysics. It provides a seamless interface to rapidly evolving astronomical events, aggregating and processing alerts from all major observatories and instruments...

Jean Ballet is a member of the Fermi-LAT collaboration, coordinating the source catalog effort since 2005. He is at the heart of the Fermi-LAT data analysis and can provide advice on how to best use those data.

Francois Brun is a member of H.E.S.S. and CTA collaborations. He has worked on various aspects of these instruments : data calibration, development of analysis methods, production of catalogs and analyses of individual sources. Since 2023 he is also Instrument Scientist of the NectarCAM cameras that will equip the middle-size-telescopes of CTA.

Fabian Schussler is an expert in multi-messenger and time-domain observations and data analysis. He has worked on Ultra-High Energy Cosmic Rays (UHECRs) with the Pierre Auger Observatory and high-energy neutrinos with the ANTARES detector. Currently, he is leading the Transient program of the H.E.S.S. very-high-energy gamma-ray observatory. He is also involved in CTAO (including LST- 1), the SVOM mission, as well as various follow-up programs across all wavelengths. Additionally, Fabian is the Principal Investigator of the Astro-COLIBRI multi-messenger platform and the Tilepy follow-up scheduling tool.

Philippe Laurent is working at the CEA Astrophysical Department in Saclay and is head of the High Energy Astrophysics Laboratory (LEPCHE). He specialized in High Energy Astrophysics and got his PHD in 1992, studying Black Holes X-ray binaries keV-MeV emission with SIGMA. He participates to the ESA/INTEGRAL gamma-ray mission since 1995, and is now the INTEGRAL/IBIS telescope Co-PI. He was also PI of the TARANIS/XGRE gamma-ray instrument developed at APC laboratory, dedicated to Terrestrial Gamma-ray Flashes. Since September 2024, he is Co-Investigator of the COMCUBE-S mission, a nanosat constellation aiming at measuring gamma-ray bursts polarization at the 2030 horizon.

Sofia Bisero is a member of the H.E.S.S. and CTAO collaborations, and a Burst Advocate and Affiliate Scientist within the SVOM collaboration. Within SVOM, she contributes to GRB afterglow modelling and participates in real-time follow-up operations. She is also involved in the development of the Astro-COLIBRI multi-messenger platform.

Ilja Jaroschewski is a member of the H.E.S.S. and CTAO collaborations. He is the co-leader of the H.E.S.S. GRB and GW program and is involved in data analysis. He is also an expert in multi-messenger modelling of long-term blazar light curves and investigates signatures for possible supermassive binary black hole inspires at blazar centers. Furthermore, he is a developer of the Astro-COLIBRI multi-messenger platform.