For those skipping straight to the comments, they basically think it's 1 or more geostationary satellites that happen to be in the path of the observed star, Ross 128.
Interestingly, we've surrounded our planet by sputniks which were invented as a step to the stars but sometimes they make our interstellar eyesight less sharp.
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[ 1.9 ms ] story [ 47.8 ms ] threadI know it's just speculation, but it's fun to speculate. What could it have been? Could any natural phenomena generate a signal like that?
It certainly wasn't a message aimed at us, or anything like that. But it did happen, so I can't help but wonder what it likely was.
http://naapo.org/WOWCometRebuttal.html