no code implementations • 11 Mar 2021 • Torrance Hodgson, Iacopo Bartalucci, Melanie Johnston-Hollitt, Benjamin McKinley, Franco Vazza, Denis Wittor
We report on the discovery of a mysterious ultra-steep spectrum (USS) synchrotron source in the galaxy cluster Abell 2877.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
no code implementations • 3 Dec 2020 • Martino Marelli, Silvano Molendi, Mariachiara Rossetti, Fabio Gastaldello, David Salvetti, Andrea De Luca, Iacopo Bartalucci, Patrick Kühl, Paolo Esposito, Simona Ghizzardi, Andrea Tiengo
Through this relationship we quantify the contribution of cosmic ray interactions to the pn unconcentrated background and we find a second source which contributes to the pn unconcentrated background for a significant fraction (30%-70%), that does not vary with time and is roughly isotropic.
Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena
