|The waveforms of the 3 events detected by LIGO during O1 (the first observation run). GW150914 and GW151226 are events which are very solidly detected (at more than 5 sigma), whereas LVT151012 has a (small) probability of being a statistical fluctuation. From this page. The inspiral phase of the new event GW151226 lasted much longer than the original GW150914 (about 80 cycles in total)|
I warmly suggest you to check this beautiful multimedia page, made by Marc Favata and his group.
As the LIGO/Virgo collaboration put it, the era of gravitational-wave astrophysics is officially started!