Illuminating the Active Universe: Multi-Wavelength and Multi-Messenger Insights into AGN

Session

Blazars

14 Sept 2026, 13:10

Auditorium Telescopium (ESO)

60. Old and very recent results on blazars

paolo giommi (INAF-Brera Observatory, Milan)

14/09/2026, 13:10

Invited

In this presentation, I will briefly review my research on blazars, much of which was carried out in collaboration with Paolo Padovani.
I will then present very recent results on the cosmological properties of blazars based on the largest complete and statistically well-defined sample of X-ray-selected blazars derived from the eRASS1 survey. I will also discuss recent identifications of...

37. Blazars: what have we learned ? What now ?

Luigi Costamante (Independent researcher)

14/09/2026, 13:40

Invited

In the past two decades tremendous progress has been made in the observation of jetted AGNs, thanks to a new generation of instruments, especially in X-rays and gamma-rays.
From population studies (going lower in luminosity, further in redshift, broader in SEDs and source types) to new phenomenology (ultra-fast variability, hard TeV spectra, changing-look AGNs, neutrinos association, X-ray...

64. AGN observations in the gamma-ray band

Dr David Paneque

14/09/2026, 14:10

Invited

Active Galactic Nuclei (AGN) serve as some of the universe's most powerful and extreme cosmic accelerators. Over the past several decades, our understanding of these objects has evolved from early taxonomic classifications into a coherent framework driven by broad multi-wavelength surveys. Today, the advent of next-generation instrumentation for high-energy photon and neutrino astronomy is...

35. Redshift Determination of gamma-ray blazars for the Cherenkov Telescope Array Observatory

Dr Paolo GOLDONI (APC/IRFU)

14/09/2026, 14:40

Regular

Blazars represent the most numerous class of High Energy (HE; E about 50 MeV to few 100 GeV) and Very High Energy (VHE; E about 100 GeV to 10 TeV) gamma-ray emitters.

The knowledge of their redshift is fundamental for understanding their emission and conducting population studies. Furthermore, the redshift is essential for indirect studies of the extragalactic background light as well as...