Newfound meteor showers expand astronomical calendar

Abstract

less-than-heavenly sources. The problem was especially acute at the site in Livingston, Louisiana, which is in the middle of a timber plantation. Any felling of trees would disturb the detector, so it could keep its laser beams 'in lock' -vibrating at precise frequencies -only at night or on weekends. A passing train would knock the site out for an hour, says physicist Brian O'Reilly, who will coordinate the followup of detections at the Livingston site. But now, he says, the detector should be able to take data over several days at a time without interruption.Advanced LIGO is already three times more sensitive than its predecessor, but in three months' time it will shut down for more