New CCD photometry of the eclipsing binary system V1067 Her

Abstract We present a new set of CCD photometric observations for the short period eclipsing binary 1SWASP J1743 (= V1067 Her). We have determined the available times of light minima and two new linear and quadratic ephemerides have been obtained. The photometric solutions for the system have been performed using Wilson and Devinney Code. The 3D and fill out configuration revealed that V1067 Her is an over contact W UMa binary with relatively low fill-out factor of about 16%. We investigated the period variation for the system. It showed a strong evidence of period changes by using the ( O-C ) residual diagram method and we have concluded long-term orbital period decrease rate d P /dt= −3.0 × 10 − 7  d/yr, corresponding to a time scale 8.6 × 10 5  yr. Such period decrease in the A-type W UMa systems is usually interpreted to be due to mass transfer from the more to the less massive component.