KM3NeT is deep-sea neutrino research infrastructure in the Mediterranean Sea, including a cubic kilometer neutrino underwater telescope.
The construction and commissioning of the detector infrastructure is currently underway.
The Cherenkov Telescope Array (CTA) is the next generation ground-based observatory for gamma-ray astronomy at very-high energies.
Both collaborations contributed to ESCAPE, the European Science Cluster of Astronomy and Particle Physics, which brings together many astrophysics and particle physics experiments to further open science in the community via the European Open Science Cloud (EOSC).
The data, measured as individual events in both telescopes, motivates the use of common tools for analysis.
In the multi-messenger era, investigation of a specific scientific question from different experiments in a synergic approach yields significant additional insights not achievable with information from one messenger alone.
This approach was successfully employed in a combination of simulated data from the high-energy array of KM3NeT (ARCA) and CTA to distinguish between leptonic and hadronic emission scenarios of gamma-ray sources in the Milky Way using a common software framework.
This contribution demonstrates the successful deployment of the analysis into the EOSC/ESCAPE thematic cluster infrastructure for future usage in the open science regime.