Hsiao-Cheng Chou (NCU); Chorng-Yuan Hwang (NCU)
We investigate close binary point sources with similar properties to look for possible lensing objects. We first searched for double point sources that are close to each other with angular separations less than 15 arcsec from Pan-STARRS PS1 catalog. We only selected pair sources that have similar colors that derived from five filters of Pan-STARRS. We then plotted the light curves of these sources to see if there is any correlation in their color and/or magnitude variation. We found some pairs showing simultaneous magnitude variations, which are difficult to explain with simultaneous variations of the properties of these pair sources because of their large physical separations.