Flare-like events

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A apparent brightening of a star in our field over about a 90 minute time span. We make millions of measurements of individual star brightness and apparent fluctuations on multiple timescales are common.  For nearly all these a non-astronomical origin for the increase in measured signal can be found - bleed in from a neighboring star image, a passing satellite, odd interactions with the edge of the field of view. Occasionally, the source of the increased signal will be astronomical but not of particular interest to us for this project, such as when the image of an asteroid is aligned with the background star image.  For a few, such as in the case above, no obvious source of the excess signal has been found and the possibility of a more interesting source for the event remains open for the time being.