https://arxiv.org/abs/1009.1855
Abstract page for arXiv paper 1009.1855: Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
on theupdatecorrelationhighestenergy
https://www.doti-optics.com/veritas-extragalactic-light
VERITAS, 1ES 1218 + 30.4 and the Extragalactic Background Light by Luis Valcarcel - Centre for High-Energy Physics, Department of Physics - McGill University
background lightveritasextragalacticdisplaysoptical