Wednesday Colloquium


"Dwarf novae in period gap"

Arkadiusz Olech (NCAC, Warsaw)


"Mysterious gamma-ray flare in blazar PKS 1222+216"

Krzysztof Nalewajko (JILA, Boulder, CO)

Cherenkov telescope MAGIC detected a Very-High-Energy flare with variability time scale of 10 minutes in PKS 1222+216. For the first time such a phenomenon was observed in a Flat-Spectrum Radio Quasar. This poses additional challenges to theoretical interpretations of rapid gamma-ray flares in blazars. We may need to completely re-think the established picture of parsec-scale AGN jets.