Four-colour photometry of eclipsing binaries - XXXIX. Light curves of the pre–main sequence triple system TY Coronae AustralisL. P.R. Vaz, J. Andersen, B. W. Casey, J. V. Clausen, R. D. Mathieu and I. HeyerAstron. Astrophys. Suppl. Ser., 130 2 (1998) 245-250DOI: https://doi.org/10.1051/aas:1998224