Speaker
Description
We present a study of the redshift distribution of 421 candidate blazars from the 1FLAT catalog, identified among the unassociated γ-ray sources in the Fermi-LAT 4FGL-DR4 catalog using the open web platform Firmamento.
The redshift analysis was performed using Firmamento, a web-based environment that provides public access to astronomical data from multiple telescopes, enabling participation in astrophysics research by professional physicists, undergraduate researchers and citizen scientists.
We obtained the redshift by retrieving public data, verifying it with the spectrum, when available, and comparing it with the Spectral Energy Distribution (SED). We used the redshift to evaluate the detectability of each source with the IACTs and with the forthcoming Cherenkov Telescope Array Observatory (CTAO).
CTAO will be an international observatory for high-energy astrophysics, with three classes of Cherenkov telescopes located in Chile and Spain.
Our preliminary results indicate that a significant fraction of these 421 sources have a detection probability of at least 25% with a moderate CTAO exposure, and roughly half of them reach this probability with a deep observation.
This work represents the starting point for 2FLAT, the second and revised version of our previous catalogue. It highlights the scientific potential of open-data infrastructures for high-energy astrophysics and, in particular, for the characterization of blazar populations.