Fundamental parameters for the eclipsing binary AzV 73in the Small Magellanic Cloud

A CCD Vlight curve for the eclipsing binary star AzV 73is presented. This new photometric observations are analysed together with previously published CCD Iphotometry from Udalski et al. ([CITE]) and spectrographic data from Niemela & Bassino ([CITE]), by means of the Wilson-Devinney code. It is found that this system is semi-detached, with an orbital inclination of roughly $86 \degr$and a separation of $42 R_{\odot}$. The sizes and masses are $R_1=11.53 \pm 0.5 R_{\odot}$, $M_1=25.26 \pm 0.7 M_{\odot}$, and $R_2=15.46 \pm 0.4 R_{\odot}$, $M_2=21.96 \pm 0.8 M_{\odot}$for the primary and secondary components, respectively.