The detection came during their initial testing of the upgraded facility before the real data run even began. The timing combined with a bit of the wording in the paper itself suggests they may be detecting events of a similar scale at a somewhat frequent basis and that more papers will be forthcoming!
Observation of Gravitational Waves from a Binary Black Hole Merger
LIGO detects gravitational waves—Press Conference
Press Release
The detection came during their initial testing of the upgraded facility before the real data run even began. The timing combined with a bit of the wording in the paper itself suggests they may be detecting events of a similar scale at a somewhat frequent basis and that more papers will be forthcoming!