@ARTICLE{Wierzcholska_Alicja_What_2017, author={Wierzcholska, Alicja}, number={Nr 4 (56) 2017 Extremes}, journal={ACADEMIA. The magazine of the Polish Academy of Sciences}, pages={45-47}, howpublished={online}, year={2017}, publisher={Polish Academy of Sciences}, language={eng}, abstract={Ultra-high-energy gamma rays are stopped by the Earth’s atmosphere before they can reach the planet’s surface. However, our atmosphere could also become a tool for detecting photons with energies in the teraelectronvolt range. By using instruments registering Cherenkov radiation, astronomers conduct observations of sources emitting ultra-high-energy photons with ground-based telescopes.}, type={Article}, title={What did SSTt-1M see?}, URL={http://journals.pan.pl/Content/112478/PDF/045-047%20wierzcholska_ang.pdf}, keywords={gamma rays, SST-1M}, }