Polarization can give a unique view of multi-messenger processes in astrophysical systems. This is particularly true for the most energetic objects in the high-energy sky, offering countless opportunities to understand the violent Universe. The synergies between optical polarization and the very high-energy gamma rays can prove invaluable to address pressing questions in blazars and gamma-ray [...]

In the next few years, eROSITA will deliver an X-ray map of the Universe with unprecedented detail, providing insights into various (astro)physics targets from dark energy to black holes and transient phenomena. Prof. Marcella Brusa will review the results from the extragalactic population obtained during the first two years of observations and will highlight the [...]

In this talk, Prof. Zhen Cao will introduce LHAASO as a survey instrument for gamma-ray sources in the northern hemisphere and its operation since 2019. The overall calibration using the Crab Nebula as the "standard candle" will be described covering also gamma/hadron separation. Energy reconstruction and resolution will be discussed, followed by Spectral Energy Distribution [...]

Relativistic sources are often highly asymmetrical, both in their geometry and in their physics. This is reflected in their polarized multiwavelength signals. Thus, polarimetry carries information about high-energy emitters (galactic X-ray binaries, AGNs, GRBs) that crucially complements total light measurements. In this context, it would be key to coordinate the CTAO's very high-energy observations with [...]

Interoperability is one of the most important aspects of Open Science which aims to make data ‘FAIR' - Findable, Interoperable, Accessible and Reusable. The ESCAPE project was a 4-year effort to address the ‘open science challenges’ of the large European astronomy and particle physics infrastructures, including the use of Virtual Observatory (VO) standards and tools [...]