Other exciting news is that the construction and building of a third LIGO detector in India has been given the
go-ahead. This project,
LIGO-India, will be part of the array of US LIGO detectors.
This will greatly help improve the sky localisation of the source of the detected gravitational waves. The GW150914 event was localised in to a 600 deg^2 sky area. This made is very difficult for the EM followup telescopes, most with with small FOV, to find anything. The Dark Energy Survey, mentioned before, is one of these telescopes doing EM followups.
Combining EM followup with the gravitational wave detectors will be the next phase in GW astronomy.