Investigation of the Magellanic eclipsing binary HV2241

We present a CCD V light curve of HV2241, together with some observations i n the B band. We analysed our photometric data jointly with previously publ ished radial velocities by means of the Wilson-Devinney code, and derived n ew values for the physical parameters of this massive eclipsing binary syst em. We confirm that this system is semi-detached, with the secondary (less massive and less luminous component) filling its Roche-lobe. From our analy sis, we estimate the following masses and radii for the components of HV224 1: M-1 = 36.2 +/- 0.7 M., R-1 = 14.9 +/- 0.4 R., M-2 = 18.4 +/- 0.7 M. and R-2 = 13.7 +/- 0.4 R. We review the spectral classification analysing HST a nd IUE data and discuss the temperature and the reddening for this star.