Korea Microlensing Telescope Network Microlensing Events from 2015: Event-Finding Algorithm, Vetting, and Photometry

摘要

We present microlensing events in the 2015 Korea Microlensing TelescopeNetwork (KMTNet) data and our procedure for identifying these events. Inparticular, candidates were detected with a novel "completed event"microlensing event-finder algorithm. The algorithm works by making linear fitsto a (t0,teff,u0) grid of point-lens microlensing models. This approach isrendered computationally efficient by restricting u0 to just two values (0 and1), which we show is quite adequate. The implementation presented here isspecifically tailored to the commission-year character of the 2015 data, butthe algorithm is quite general and has already been applied to a completelydifferent (non-KMTNet) data set. We outline expected improvements for 2016 andfuture KMTNet data. The light curves of the 660 "clear microlensing" and 182"possible microlensing" events that were found in 2015 are presented along withour policy for their public release.