Gwenhaël De Wasseige

Academic staff


Centre for Cosmology, Particle Physics and Phenomenology - CP3
Université catholique de Louvain
2, Chemin du Cyclotron - Box L7.01.05
B-1348 Louvain-la-Neuve

+32 10 47 32 44


UCL member card
Research statement
I am an astroparticle physicist, member of the IceCube and the KM3NeT collaborations. I have mainly focused so far on low-energy (MeV-GeV) neutrinos coming from transient events, such as solar flares, core-collapse supernovae, and compact binary mergers.
My work has three different directions:
- I push the detection limits of each instrument, lowering down the threshold to sub-GeV energies;
- I carry out searches for these low-energy neutrinos, developing new strategies to cope with a significant atmospheric and environmental background inherent to this energy range;
- I convert the obtained limits into constraints on physical parameters of the studied transient sources.

I strongly believe the combination of different messengers, as neutrinos, electromagnetic and gravitational waves, as well as the use of advanced data science tools in joint analyses are the key to unravel the mysteries of our Universe and the high-energy phenomena it contains. This is hence the main direction of the Astroparticle group at CP3.
* Invited plenary speaker at ICHEP2022, Bologna, Italy
* Co-group leader of the 'Supernova' working group in IceCube (astrophysical neutrinos from MeV to GeV)
* Convener of the 'Education and Outreach' session at ICHEP2022
* Convener of the 'Diversity, Inclusion, and Accessibility' working group in IPPOG - 2021-Present
- LPHYS2221: Astrophysics and astroparticles
- LPHYS2336: Accelerator, astroparticle, and gravitational wave physics
- LPHYS2191: Seminars
- LPHYS2197: Thesis tutorial
People responsibilities
Mathieu Lamoureux (Other - Francqui startup2021) (member since March 2022)
I have done my PhD on the T2K neutrino experiment, mostly looking for hypothetical heavy neutrinos using T2K near detector -> did not find anything and put upper limit. Then, I have performed a 3-yr fellowship in INFN Padova (Italy) + secondment period in APC Paris (France), where I have been focusing on multi-messenger neutrino astronomy, especially the search for neutrinos in time and spatial coincidence with gravitational waves detected by LIGO/Virgo.

PhD students
Karlijn Kruiswijk (Other - Francqui startup2021) (member since October 2021)
I am a PhD student in astrophysics, and a member in the IceCube collaboration. My PhD thesis is on on low energy (MeV-GeV) neutrinos from Gamma-Ray Burst populations. For this I work on improving the detection and reconstruction of low energy neutrinos, and look at properties of the electromagnetic spectra of Gamma-Ray Bursts to categorize them.
Jonathan Mauro
Looking for solar-flares produced neutrinos with KM3NeT :).

Master students
Romain Gorski
Master student studying AGN (Active Galaxy Nuclei) using electromagnetic, neutrinos and gravitational waves data. The main objective is to search for correlations and space-time coincidence between those three. To do so, I make use of computational and data analysis (plus an ounce of machine learning) methods.
- Francqui Start-Up Grant - Francqui Foundation and UCLouvain - 2021
- LabEx UnivEarthS exploratory grant for the project LEAK (project leader) - 2020
- Best poster award at the International Cosmic Ray Conference 2019, Madison, Wisconsin - 2019
- Balzan Fellowship, WIPAC, University of Wisconsin-Madison - 2019
- F.R.S - FNRS postdoc (mandat de Chargé de recherches in Belgium, 3 years) - 2019
- Materials-Based Research Grant from the Center for Craft with Donald Fortescue - 2019
- Marie Sklodowska-Curie Individual Fellowship - 2018-2019
- INFN Postdoctoral fellowship - 2019
- DIM ACAV grant for the LEANOR project - 2019
- Young Speaker Award from the Belgian Physical Society - 2018
- Prize for Science Communication by the Royal Flemish Academy of Belgium - 2017
- Antarctica Service Medal of the United States of America - 2017
- IceCube Communications Certificate - 2017
Professional activities
- Convener of the 'Diversity, Inclusion, and Accessibility' working group in IPPOG - 2021-Present
- Belgian representative of the International Particle Physics Outreach Group (IPPOG) - 2021-Present
- Member of the KM3NeT Institute Board - 2021-Present
- Member of the IceCube Institute Board - 2021-Present
- Co-chair of the Outreach committee in the KM3NeT Collaboration - 2021-Present
- Co-leader of the WP dedicated to KM3NeT in the REINFORCE (H2020 SwafS) - 2019-2022
- Early Career Representative in the KM3NeT Collaboration - 2019-2021
- Member of the KM3NeT Institute Board as ECS representative - 2019-2021
- Reviewer for European Physical Journal C, Astroparticle Physics Journal - 2018-Present
- Developer and coordinator of the snow-depth measurement system for IceTop - 2016-2019
- Developer and coordinator of a database for gravitational wave-based sub-GeV neutrino search in IceCube - 2016-Present
- Crew member of the IceCube South Pole summer season - 2016
- Developer and coordinator of the IceCube SFNews alert system for solar flares - 2015-2019
- UCLouvain PI of the REINFORCE SwafS project (20k euros for UCLouvain) - 2022
- IISN IceCube convention - (UCLouvain PI, 265k euros) - 2021
- Francqui Start-Up Grant (PI, 200k euros)- Francqui Foundation and UCLouvain - 2021
- LabEx UnivEarthS exploratory grant for the project LEAK (project leader, 16k euros/year) - 2020
- Balzan Fellowship, WIPAC, University of Wisconsin-Madison (declined for personal reasons) - 2019
- F.R.S - FNRS postdoc (mandat de Chargé de recherches in Belgium, 3 years, declined for personal reasons) - 2019
- Materials-Based Research Grant from the Center for Craft with Donald Fortescue - 2019
- Marie Sklodowska-Curie Individual Fellowship 2018 - 2019
- INFN Postdoctoral fellowship (declined for personal reasons) - 2019
- DIM ACAV grant for the LEANOR project - 2019
Research directions:
Data analysis in HEP, astroparticle and GW experiments

Experiments and collaborations:

Active projects
Low-energy neutrinos from astrophysical transient sources
Gwenhaël De Wasseige, Karlijn Kruiswijk

This project aims at optimising neutrino telescopes, especially the IceCube Neutrino Observatory and KM3NeT, to detect GeV and sub-GeV astrophysical neutrinos. The instruments are then used to search for low-energy neutrinos from transient sources, such as solar flares, compact binary mergers, or gamma-ray bursts.
Multi-messenger studies of transient sources
Giacomo Bruno, Gwenhaël De Wasseige, Karlijn Kruiswijk, Andrew Miller, Magdalena Sieniawska, Jishnu Suresh

This project aims at studying astrophysical phenomena combining different messengers, mainly neutrinos and gravitational waves.
Previous positions
- Marie Sklodowska-Curie Individual Fellow, Astroparticule et Cosmologie Laboratoire (APC), Université de Paris, France - 2019-2021
- DIMACAV postdoc researcher, Astroparticule et Cosmologie Laboratoire (APC), CNRS - 2018-2019
Publications in IRMP
All my publications on Inspire
Organization of scientific meetings
- Member of the SOC, Town Hall KM3NeT meeting planned for May 2022, Catania, Italy
- Member of the International Advisory Committee, First Pan-African Astroparticle and Collider Physics Workshop, planned for March 2022 (online)
- Co-chair, Cosmic Rays and Neutrinos in the Multi-Messenger Era 350 + attendees, Paris, France (online) - 2021
- Member of the SOC, Town Hall KM3NeT meeting 60 + attendees, Marseille, France - 2019
- Co-organizer, Gravitational Waves: The Discovery and Outlook 100 + attendees, Brussels, Belgium - 2016
Outreach and Education
I am passionate about science communication. I am especially interested in developing large-scale outreach programs that can reach a broad audience and trigger science discussion within families and friends. I have for example designed a experiment contest that was asking the participants to develop an experiment that would have a different result in Belgium and at the South Pole. This effort was awarded the annual prize for science communication by the Belgian Academy for Science and Arts in 2017. More recently, I designed and organised on behalf of the KM3NeT Collaboration a drawing contest. The participants had to draw a neutrino. More than 500 drawings from 16 different countries.

I am also interested in science and art projects. I collaborate with Donald Fortescue, PhD in Art and professor at the Californian College of the Arts in San Francisco. Together we are searching for more inclusive ways to present scientific data that can optimize the scientific output and reach a larger fraction of the population. A concrete example of our collaboration can be seen online (

I also engage in citizen science. I designed, within the EU REINFORCE Consortium an activity on the Zooniverse platform that proposes to participants to classify bioluminescence signatures recorded with KM3NeT.