In 2012 I joined the H.E.S.S. and CTA collaborations in order to further enlarge my knowledge and involvement in multi-messenger analyses. I got very rapidly recognized within the high-energy gamma-ray community for these efforts and was for example able to present a first joint neutrino – gamma ray analysis on behalf of the H.E.S.S. collaboration in summer 2013 (“Multi-wavelength study of the region around the ANTARES neutrino excess”, 33rd International Cosmic Rays Conference, arXiv: 1307.6074). See below for some more details. In addition to contributions to the data calibration, I worked as corresponding author on a paper on high-energy emission from microquasars using data from H.E.S.S. and RXTE. You can find the paper here. In 2016 I analyzed H.E.S.S. follow-up observations of Fast Radio Bursts detected by the SUPERB project at the Parkes radio telescope. The resulting paper describes the first ever limits on TeV afterglows of Fast Radio Burst: A&A 597, A115 (2017). More details are given on the dedicated page: Fast Radio Bursts I currently coordinate and lead several topical tasks within the H.E.S.S. collaboration (“Neutrino alert system”, “High-energy neutrino events” and "Gravitational waves"). In 2014 I have been nominated as the official H.E.S.S. multi-messenger contact. A snapshot of these activities in the multi-messenger searches are illustrated on this page: Multi-messenger analyses
Cherenkov Telescope Array (CTA)
Within the CTA consortium I am mainly involved in the preparation of the scientific exploitation. I was a member of the core Editorial Board responsible for the CTA Key Science Project on “Transient Sources” where I focussed on multi-messenger aspects like the response of CTA to alerts from high-energy neutrino telescopes and gravitational wave observatories. I put together the Top Level Science Use Cases defining how CTA will react to alerts from high-energy neutrino telescopes and gravitational waves observatories. Since 2018 I am convening the "Transients and MWL" science working group.
The High-Altitude Water Cherenkov Observatory (HAWC)
Exploiting a detection technique largely complementary to the Imaging Air Cherenkov Observatories H.E.S.S. and CTA, HAWC is monitoring the gamma-ray sky with a ground array of particle detectors. End of 2017 I became accepted as associated member of the HAWC collaboration contributing to multi-messenger analyses.
The Southern Gamma-ray Survey Observatory (SGSO)
Following the success of the HAWC observatory, a next-generation air shower array detecting high-energy gamma-rays in the Southern Hemisphere would perfectly complement the upcoming CTA observatory. We started the Southern Gamma-ray Survey Observatory (SGSO) Alliance with the goal to define and promote such an installation. This enterprise now evolved into a full scientific collaboration called SWGO. See SGSO + AMIGO