SELECTION CRITERIA
Blazars
From the blazars included in the Roma-BZCAT catalogue, we selected 38 high-priority targets based on mutual visibility of KM3NeT and Noto tele-
scope (−34° < Dec < 55°) and the following criteria:
- A flux-density cut of F1 GHz>1 Jy, resulting in a parent sample of 216 radio-bright blazars.
- Identification of the most promising neutrino candidates by applying beaming-based thresholds (based on MOJAVE beaming indicators; Homan et al. 2021):
- Doppler factor D>20
- viewing angle θ<2.5°
- Inclusion of very bright blazars with F1 GHz>4 Jy, even if they do not strictly satisfy the above DDD and θ\thetaθ criteria, due to their high observational relevance.
Seyfert Galaxies
From the Seyfert Galaxies included in the Turin-SyCAT2 catalogue, we selected 13 high-priority Seyfert galaxies with −34° < Dec < 55° based on the following criteria:
- Seyfert galaxies with confirmed NVSS (1.4 GHz) radio counterparts and F1 GHz>100 mJy.
- .X-ray luminosity LX≥1042 erg s−1 from the Swift-BAT 105-month survey (Oh et al. 2018).
This sample also includes 3 Seyfert galaxies for which an excess of neutrino events has been reported by IceCube (Neronov et al. 2024).
Microquasars
We considered as high-priority observing sources all the known microquasars with (−34° < Dec < 55°).