UFFO device intended for the studies of gamma-bursts is a 20-cm UV-optic telescope and X-ray camera.
What’s an idea of the measurement method?
Three complexes of the equipment onboard the “Lomonosov” satellite (BDRG, ShOK and UFFO) will provide multiwave measurements of gamma-bursts necessary for the studies of their nature, i.e. measurements within the optic, gamma, X-ray and UV ranges of electromagnetic spectrum.
According to: http://uffo.ewha.ac.kr/?mid=SpacecraftUFFO