2 Observations

The system was observed photoelectrically at the Ege University Observatory (EUO) on 16 nights and at the Ankara University Observatory (AUO) on 13 nights during the summer of 1995. The observations were obtained with the 48-cm Cassegrain reflector of EUO and the 30-cm Maksutov telescope of AUO. The SSP5A photometer was used on both telescopes. A total of 871 blue and 853 yellow observational points have been obtained at EUO. ${\rm BD\,}+37^{\circ}3879$ and ${\rm BD\,}+36^{\circ}4095$ were used as comparison and check stars. A total of 597 observational points in each color of ultraviolet, blue and yellow have been obtained at AUO, and ${\rm BD\,}+36^{\circ}4095$ was used as comparison star. No variations in brightness were detected for the comparison stars. The observations of comparison stars were used to determine the nightly extinction coefficients in each color separately. All the instrumental differential magnitudes (in the sense variable minus comparison) were corrected for the atmospheric extinction. The differential observations for which the probable error of a single observation was estimated to be $\pm\, 0\hbox{$.\!\!^{\rm m}$}007$ at EUO and $\pm\, 0\hbox{$.\!\!^{\rm m}$}01$ at AUO for all wavelengths are available on request from the authors.