Journees de l'ATPEM 2025

Oct 1, 2025, 9:00 AM → Oct 3, 2025, 5:00 PM Europe/Paris

salle Charpak LPNHE (Campus Jussieu)

The Action Thématique Phénomènes Extrêmes et Multi-messagers (ATPEM, formerly PNHE) is an INSU thematic action since 2011, supported by IN2P3, INP, CNES, and CEA/IRFU.

The ATPEM days will take place from October 1 to 3, 2025 in the LPNHE Charpak room in Jussieu. The event will provide an opportunity to make an overview of the current state of extreme and multi-messenger phenomena in France.

The deadline for submission of contributions is: June 1
The final program will be distributed on June 15.

Deadline for registration (and for the participation to the apéritif dînatoire): July 1

Wed, October 1

9:00 AM → 9:05 AM Welcome, Organisation des journées: P.O. Petrucci, D. Maurin

presentation.key

presentation.pdf

9:00 AM Informations générales

Speaker: pierre-olivier petrucci (IPAG)

presentation.pdf

9:05 AM → 10:00 AM Origine, production et transport des particules de HE (photons, neutrinos et RC)

Convener: Astrid Lamberts (Observatoire de la Côte d'Azur)

9:05 AM Particle acceleration in extreme environment: Martin Lemoine (APC)

Speaker: Martin Lemoine (APC (Astroparticule & Cosmologie, CNRS - Université de Paris))

Lemoine_ATPEM25.pdf

9:30 AM Facilitating multi-messenger modelling using Gammapy: Lea Heckmann (APC)

Speaker: Lea Heckmann (APC)

ATPEM_2025.pdf

9:45 AM In-ice radio signatures of cosmic-ray air showers for identification and background rejection: Simon Chiche (IIHE)

Speaker: Simon Chiche (Institut d'Astrophysique de Paris)

ATPEM2025_SimonChiche.pdf

10:00 AM → 10:30 AM Coffee Break

10:30 AM → 11:25 AM Processus physiques en jeu dans l’environnement des objets compacts (NS & PWNe & Magnetars, systèmes binaires, AGN, BH)

Convener: Astrid Lamberts (Observatoire de la Côte d'Azur)

10:30 AM HPC Results of black hole environment - Benjamin Crinquand (IRAP)

Speaker: Mr Benjamin Crinquand (IRAP)

10:55 AM Spectro-polarimetric modelling of XrB observations in the JED-SAD/MONK framework: Rafan Muhammad (IPAG)

Speaker: Mr Rafan Muhammad

11:10 AM Pulsar wind nebulae in wind-blown bubbles: Lioni-Moana Bourguinat (GSSI)

Speaker: Lioni-Moana Bourguinat (GSSI)

Bourguinat ATPEM 2025.pdf

11:25 AM → 11:45 AM Conclusions of the CNES propsectives: Philippe Laudet (CNES)

Convener: Astrid Lamberts (Observatoire de la Côte d'Azur)

11:25 AM Prospective CNES

Speaker: Mr Philippe Laudet

11:45 AM → 12:05 PM Conclusions of the INSU Prospectives: Benoit Famaey (OAS)

Convener: Astrid Lamberts (Observatoire de la Côte d'Azur)

11:45 AM Prospective INSU-AA

Speaker: Benoit Famaey (CNRS Observatoire astronomique de Strasbourg)

12:05 PM → 12:30 PM Discussion prospectives

Convener: Astrid Lamberts (Observatoire de la Côte d'Azur)

12:30 PM → 2:00 PM Lunch break

2:00 PM → 2:30 PM Enjeux sociétaux: The Carbon Footprint of Astronomy Research: Jurgen Knödlseder (IRAP) EN DISTANCIEL

Conveners: Jerome Novak (Observatoire astronomique de Strasbourg - CNRS), Jürgen Knödlseder (IRAP)

SF2A_Reseau_AGL_20250630.pdf

2:30 PM → 4:10 PM Origine, émissions multi-messagers et évolution temporelle des phénomènes transitoires (GRB, Supernovae, FRB,...): Chair: Jerome Novak

Convener: Jerome Novak (Observatoire astronomique de Strasbourg - CNRS)

2:30 PM Science with SVOM (and Einstein Probe) - Bertrand Cordier (CEA)

Speaker: Bertrand Cordier (CEA)

SVOM_ATPEM_2025.pdf

2:50 PM Colibri: Where are we now? first results and opening up to the community: Stéphane Basa (LAM)

Speaker: Stephane Basa (Laboratoire d'Astrophysique de Marseille)

COLIBRI.key

3:10 PM Internal hydrodynamical shocks as a mechanism for GRB prompt emission: Arthur Charlet (ARCO)

3:25 PM Formation Channels of Gravitational-Wave Sources: Insights from Isolated Binary Evolution and Beyond: Aleksandra Olejak (MPIA)

Speaker: Mrs Olejak

3:40 PM A scenario for short GRB precursor flares: tidal resonances of gravito-inertial modes in binary neutron stars: Alexis Reboul-Salze (AEI)

Speaker: Alexis Reboul-Salze (CEA Saclay)

Reboul_Salze_ATPEM_2025.pdf

3:55 PM Unfolding the high-redshift Universe with GRBs: Andrea Saccardi (AIM/CEA)

Speaker: Andrea Saccardi (Observatoire de Paris - GEPI)

ATPEM_ANDREASACCARDI_full.pdf

4:10 PM → 4:40 PM Break

4:40 PM → 5:25 PM Recherche de nouvelle physique dans les données astrophysiques

Convener: Jerome Novak (Observatoire astronomique de Strasbourg - CNRS)

4:40 PM Multi-wavelengths analyses of the millisecond pulsar PSR J0437-4715 to constrain dense matter physics: Pierre Stammler (IRAP)

Speaker: Pierre STAMMLER (IRAP/CNRS)

ATPEM Days 2025 Presentation

ATPEM Days 2025 presentation.pdf

4:55 PM Using Millisecond Pulsars to constrain dense matter with NICER: Lucien Mauviard (IRAP)

Speaker: Mr Mauviard

Mauviard_ATPEM.pdf

PPM_short.gif

5:10 PM Spacetime imprints in black hole light curve autocorrelations: Irene Urso (LIRA)

Speaker: Irene Urso (LIRA, Paris Observatory)

ATPEM_Urso.pdf

5:25 PM → 6:55 PM Les moyens d'observation pour les thématiques PEM

Convener: Jerome Novak (Observatoire astronomique de Strasbourg - CNRS)

5:25 PM PTA: what's new? Gilles Theureau (LPC2E)

Speaker: Gilles THEUREAU (LPC2E, CNRS-Orléans and Nançay Radio Observatory, Paris Observatory)

PTA_ATPEM_2025_GTheureau.pdf

5:45 PM Recent highlights from LHAASO: Dmitri Semikoz (APC)

Speakers: Dmitri SEMIKOZ (APC, Paris), Dmitri Semikoz (APC, Paris)

LHAASO_highlights_Oct2025_ATPEM_Paris.pdf

6:05 PM LSST and brokers: where are we now? Emille Ishida (LPCA)

Speaker: Dr Emille Ishida (CNRS/LPC-Clermont)

Ishida_brokers

6:25 PM Steps toward the fifth Fermi-LAT source catalog: Jean Ballet (AIM/CEA)

Speaker: Jean Ballet (AIM, CEA Saclay)

jballet_FL16Y_ATPEM25_v2.pdf

6:40 PM Towards highest and lowest energies for the High Energy Stereoscopic System (H.E.S.S.) in Namibia: Wassim Si Said (LLR)

Speaker: Wassim Si Said (Laboratoire Leprince Ringuet (LLR))

ATPEM-WSISAID.pdf

7:00 PM → 10:00 PM Apéritif dinatoire dans les caves Esclangon, site de Jussieu

A "buffet dinatoire" will be organized on Wednesday 1st Oct evening between 19h30 and 22h in the Esclangon cellars in the Jussieu campus basement

https://sciences.sorbonne-universite.fr/faculte/location-despaces/hall-et-caves-esclangon

They are located directly under the Esclangon building, at 4 place Jussieu, 75005 Paris, on the right as you enter the campus.

Thu, October 2

9:00 AM → 10:00 AM Les moyens d'observation pour les thématiques PEM

Convener: Diego Gotz (CEA Saclay)

9:00 AM More than 20 years of observations by the HESS observatory and the future with CTA: Mathieu de Naurois (LLR)

Speakers: Mathieu de Naurois (LLR Ecole Polytechnique), Mathieu de Naurois

denauroi_HESS.pdf

9:25 AM Recent results from XRISM: Anne Decourchelle (CEA)

Speaker: Anne Decourchelle Decourchelle (CEA Saclay)

2025-10-02ATPEM_XRISM_Decourchelle.pdf

9:45 AM Early UV Follow-Up of Gravitational Wave Events with ULTRASAT: Weizmann Kiendrebeogo (CEA/IRFU)

Speaker: R. Weizmann KIENDREBEOGO (CEA, Irfu)

Weizmann_ATPEM_2025.pdf

10:00 AM → 10:30 AM Enjeux sociétaux: Association "vient voir mon taf" : Virginie Salmen

Convener: Diego Gotz (CEA Saclay)

SF2A_Reseau_AGL_20250630.pdf

10:30 AM → 11:00 AM Break

11:00 AM → 11:30 AM Processus physiques en jeu dans l’environnement des objets compacts (NS & PWNe & Magnetars, systèmes binaires, AGN, BH)

Convener: Diego Gotz (CEA Saclay)

11:00 AM Challenges to Line-Driven Wind Launching in AGN from Full Hydro-Radiation-Ionization Simulations: Nicolas Scepi (IPAG)

Speaker: Nicolas Scepi (IPAG CNRS)

Scepi_Nicolas_ATPEM.pdf

11:15 AM Bubbles of ionized gas around Ultraluminous X-ray sources: Anastasia Kilina (IRAP)

Speaker: Mrs Anastasia Kilina

ATPEM_2025.pdf

11:30 AM → 12:30 PM Discussion prospectives: Intervention des tutelles INSU, IN2P3, INP, CEA et CNES

Convener: Diego Gotz (CEA Saclay)

11:30 AM Intervention INSU: Susanna Vergani

Speaker: Susanna Diana VERGANI (CNRS-Observatoire de Paris)

talk2025INSU.pdf

11:40 AM Intervention IN2P3: Nicolas Leroy

Speaker: Nicolas Leroy (IJCLab IN2P3/CNRS)

11:50 AM Intervention INP: Bertrand Georgeot

Speaker: Mr Bertrand Georgeot

12:00 PM Intervention CEA: Stéphane Mathis

Speaker: Mr Stephane Mathis

12:10 PM Intervent CNES: Philippe Laudet

Speaker: Philippe Laudet

12:30 PM → 2:00 PM Lunch break

2:00 PM → 3:15 PM Origine, émissions multi-messagers et évolution temporelle des phénomènes transitoires (GRB, Supernovae, FRB,...)

Convener: Stefano Gabici

2:00 PM Binary supermassive black holes: observations and constraints: Marta Volonteri (IAP)

Speaker: Marta Volonteri

ATPEM_2025.pdf

ATPEM_2025.pptx

2:25 PM ACME: where are we now? Antoine Kouchner (APC)

Speaker: Antoine Kouchner (Laboratoire APC)

2:45 PM The electromagnetic hunt for binary black holes: numerical, analytical & observational effort: Raphael Mignon-Risse (Universidad de Valladolid ) EN DISTANCIEL

Speaker: Raphaël Mignon-Risse (CNES/APC)

3:00 PM Nuclear parameter inference with future observations of neutron stars: Lami Suleiman (Deutsches Elektronen-Synchrotron)

Speakers: Lami Suleiman (Deutsches Elektronen Synchrotron), Ms Lami Suleiman (Laboratoire Univers et Théories)

ATPEM2025.pdf

3:15 PM → 3:45 PM Enjeux sociétaux: Parity, gender and social bias - Thibaut Paumard (LIRA)

Conveners: Stefano Gabici, Thibaut Paumard (LESIA - CNRS/Observatoire de Paris)

SF2A_Reseau_AGL_20250630.pdf

3:45 PM → 4:03 PM Flash talks

Convener: Stefano Gabici

3:45 PM Astronomie multi-messager : étude de signaux transitoires extrêmes en rayons gamma et neutrinos: P. Pichard (APC)

Speaker: Pierre Pichard (APC)

flashtalk_atpem_pichard.pdf

3:47 PM Feedback in galaxies: the role of cosmic rays: Nimatou S. Diallo (IAP)

Speaker: Nimatou Seydi Diallo (IAP)

Diallo_atpem_days.pdf

3:49 PM Particle acceleration in Ultra Fast Outflows: Baptiste Le Nagat Neher (LUX)

Speaker: Baptiste Le Nagat Neher (Observatoire de Paris -- LUX)

ATPEM_Le_Nagat_Neher.pdf

3:51 PM The environment of TeV halo progenitors: Lioni-Moana Bourguinat (GSSI)

Speaker: Lioni-Moana Bourguinat (GSSI)

ATPEM 2025 Bourguinat Flashtalk.pdf

3:53 PM Neutron star simulations as sources of gravitational waves: Jerome Novak (OAS)

Speaker: Jerome Novak (Observatoire astronomique de Strasbourg - CNRS)

novak_atpem.pdf

3:55 PM Precision cross-sections for advancing cosmic-ray physics and other applications: a comprehensive programme for the next decade: Maurin (LPSC)

Speakers: David MAURIN (LPSC), David Maurin (LPSC)

2025-10_AT-PEM.pdf

3:57 PM Understanding GRB progenitors from their environment: Jesse Palmerio (CEA)

Speaker: Dr Jesse Palmerio (CEA/IRFU)

flash_talk_Palmerio.pdf

3:59 PM Gamma-ray burst minimum variability timescale with Fermi/GBM: Romain Loic Maccary (Unife, Italy)

Speaker: Mr Romain Loic Maccary

4:01 PM Testing planar matter distribution at the Galactic Center: Arianna Foschi (LIRA)

Speaker: Arianna Foschi (Observatoire de Meudon)

flash_talk_ATPEM.pdf

4:03 PM → 4:30 PM Break

4:30 PM → 5:00 PM Processus physiques en jeu dans l’environnement des objets compacts (NS & PWNe & Magnetars, systèmes binaires, AGN, BH)

Convener: Stefano Gabici

4:30 PM Kinetic Simulations of Flaring Activity in a Black Hole Magnetosphere: Enzo Figueiredo (IPAG)

Speaker: Enzo Figueiredo (IPAG, CNRS, Université Grenoble Alpes)

4:45 PM The Rhythms of Chaos: Latest news about Quasi-Periodic Eruptions : Erwan Quintin (ESA)

Speaker: Erwan Quintin (IRAP, Toulouse)

5:00 PM → 6:00 PM Recherche de nouvelle physique dans les données astrophysiques: Session 1

Convener: Stefano Gabici

5:00 PM Origine of the Dark matter: where are we now ? Marco Cirelli (LPTHE)

Speaker: Marco CIRELLI (LPTHE Jussieu CNRS)

11.DMcandidates.JournéesATPEM.pdf

5:25 PM Résultats O4: etat des lieux et instrumentation future (Einstein telescope/Virgo nEXT) - Viola Sordini (IP2I)

Speakers: Viola Sordini (IP2I Lyon), viola sordini (in2p3, infn)

LVKO4_ATPEM_Oct2025_VSordini.pdf

5:45 PM InterGalactic Magnetic Fields and Gamma-Ray Bursts with CTAO: Ténéman Keita (CEA/IRFU)

Speaker: Ténéman Keita (CEA Paris-Saclay)

ATPEM_TKeita.pdf

6:00 PM → 6:40 PM Les moyens d'observation pour les thématiques PEM

Convener: Stefano Gabici

6:00 PM KM3NeT/IceCube results - Valentin Decoene (Subatech)

Speakers: Valentin Decoene (Institut d'Astrophysique de Paris), Valentin Decoene (Subatech / Nantes Université)

KM3NeT_IceCube_Decoene-min.pdf

6:20 PM CTA-France : What’s new ? - Fabio Acero (AIM), Stefan Fegan (LLR), Pierre Cristofari (LUX)

Speakers: Fabio Acero (CEA/Saclay), Mr Pierre Cristofari (Observatoire de Paris), Stephen Fegan (LLR, Ecole Polytechnique, IN2P3/CNRS), pierre cristofari (APC CNRS)

CTAO_ATPEM_Oct_2025.pdf

Fri, October 3

9:00 AM → 9:30 AM Discussion prospectives: Re-organisation des SNO. Quid d'un SNO alerte?

Convener: David MAURIN (LPSC)

9:00 AM La re-organisation des SNO: Franck Le Petit (Obs Paris)

Speaker: Franck Le Petit Le Petit (LUTH - Observatoire de Paris)

ReOrgSNO_251003_PEM.pdf

9:15 AM Vers un SNO Alerte? Susanna Vergani (Obs Paris) & Pierre-Olivier Petrucci (IPAG)

Speaker: pierre-olivier petrucci (IPAG)

SNO.pdf

9:30 AM → 10:30 AM Les moyens d'observation pour les thématiques PEM

Convener: David MAURIN (LPSC)

9:30 AM NewAthena status report : Didier Barret (IRAP)

Speaker: DIDIER BARRET (IRAP)

2025_ATPEM_NewAthenaStatus.pdf

9:50 AM Review of the four years of IXPE operation: Frédéric Marin (OAS)

Speaker: Frédéric Marin (Observatoire astronomique de Strasbourg)

Marin.pdf

10:10 AM SKA-France : What’s new ? Chiara Ferrari (OCA)

Speaker: Chiara Ferrari (Lagrange, OCA)

SKA-France_ATPEM_251003.pdf

10:30 AM → 11:00 AM Coffee Break

11:00 AM → 11:35 AM Les moyens d'observation pour les thématiques PEM

11:00 AM GRAND: état des lieux: Claire Guépin (LUPM)

Speakers: Claire GUÉPIN-DETRIGNE (Laboratoire Univers et Particules de Montpellier), Claire Guepin (LUPM), Claire Guépin (IAP)

ATPEM_Sep2025_GRAND_CG.pdf

11:20 AM Search for cosmic rays in GRANDProto300: Jolan LAVOISIER (IAP)

Speaker: Mr Jolan Lavoisier

ATPEM2025_compressed.pdf

11:35 AM → 12:35 PM Processus physiques en jeu dans l’environnement des objets compacts (NS & PWNe & Magnetars, systèmes binaires, AGN, BH)

Convener: David MAURIN (LPSC)

11:35 AM Self-consistent simulations of the radiative transfer in gamma-rays in neutron star magnetospheres: Théo Francez (LUX)

Speaker: Théo Francez (LUTh - Observatoire de Paris - PSL)

2025_atpem_Francez.pdf

11:50 AM Probing Multi-TeV Emission in Pulsars: Perspectives from Fermi-LAT 3PC Phase-Resolved Spectral Analysis: Maxime Regeard (APC)

Speaker: Maxime Regeard (APC, IN2P3, CNRS, Université Paris-Cité)

ATPEM_RDA_pulsars.pdf

12:05 PM Tayler-Spruit dynamo to form magnetars: impact of rotation: Paul Barrere (Univ. Genève)

Speakers: Paul Barrère (CEA), Paul Barrère (CEA Saclay/Département d'Astrophysique)

BARRERE_ATPEM2025.pdf

12:20 PM Linking protoneutron star Tayler-Spruit dynamos to low-field magnetars: Raphael Raynaud (UPCité)

Speaker: Raphaël Raynaud (CEA Saclay)

talk_raynaud_atpem2025.pdf

12:35 PM → 1:15 PM Enjeux sociétaux: Astronomie participative

Convener: David MAURIN (LPSC)

SF2A_Reseau_AGL_20250630.pdf

12:35 PM Participative Astronomy: Damien Turpin (CEA)

Speaker: Damien TURPIN (CEA-Saclay)

citizen_science_ATPEM.pdf

Citizen Sciences in High-energy Astrophysics

12:55 PM The RAPAS network: William Thuillot (IMCCE)

Speaker: Mr William Thuillot

RAPAS-ATPEM-WThuillot.pdf