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Adamo (8), A. Aloisi (5), Amherst, B.C. Whitmore (5) ((1) University of Pisa, B. G. Elmegreen (11), D. A. Dale (10), D. A. Gouliermis (13, D. A. Hunter (15), D. A. Thilker (18), D. Calzetti (6), D. O. Cook (9), E. K. Grebel (13), E. Sabbi (5), E. Sacchi (3, J. C. Lee (5, J.S. Gallagher III (12), K. E. Johnson (16), K. Grasha (6), L. J. Smith (17), L. Ubeda (5), M. Cignoni (1, M. Messa (8), M. Tosi (3), Sezione di Pisa, Spitzer Science Center, T.J. Watson Research Center","submitted_at":"2018-02-19T19:00:01Z","abstract_excerpt":"We use HST observations from the Legacy Extragalactic UV Survey to reconstruct the recent star formation histories (SFHs) of three actively star-forming dwarf galaxies, NGC4449, Holmberg II and NGC1705, from their UV color-magnitude diagrams (CMDs). We apply a CMD fitting technique using two independent sets of stellar isochrones, PARSEC-COLIBRI and MIST, to assess the uncertainties related to stellar evolution modelling. 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