http://setiathome.berkeley.edu/forum_thread.php?id=44764&nowrap=true#700669 http://setiathome.berkeley.edu/forum_thread.php?id=44764&#38... has more than you'd

http://setiathome.berkeley.edu/forum_thread.php?id=44764&nowrap=true#700669 http://setiathome.berkeley.edu/forum_thread.php?id=44764&#38... has more than you'd ever want to read about it, but I'll attempt to summarize: Inconclusive, but possibly something like a supernova or a neutron star collision, probably extragalactic, and almost certainly _not_ engineered by intelligent life.