Results So Far
After 27 months, we've seen 191 "events" from 160 stars (of 3,400 total stars observed), roughly 0.7 per night. These events appear to be uncorrelated with stellar magnitude; nor do they exhibit any periodicity. In fact, there is no clear evidence that they originate from light entering the telescope from the direction of the targeted star.
We are conducting tests to determine the origin of these irregular events. By "event," we mean an instance when each photodetector sees multiple photons (light pulses) within a very short time interval (roughly a nanosecond).