AAOmega spectrum of CoRoT 102899501 (thin line) in three different spectral regions, along with the best-fitting template overplotted (thick line). The spectra have been arbitrarily normalised to the flux reported in the title of the vertical axis. The differences between observed and best-fitting spectrum are displayed in the lower part of each panel. Emission in the Balmer and Ca ii H and K lines is detected, as well as a strong Li i λ 6707.8 Å absorption line, suggesting a young and active solar-like star.