FliPer: A global measure of power density to estimate surface gravities of main-sequence solar-like stars and red giantsL. Bugnet, R. A. García, G. R. Davies, S. Mathur, E. Corsaro, O. J. Hall and B. M. RendleA&A, 620 (2018) A38DOI: https://doi.org/10.1051/0004-6361/201833106