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GW170814: a gravitational-wave signal emitted by a binary black hole system localized in the narrowest sky area reconstructed to date
GW170814 is the fourth published detection of gravitational waves. As was the case with the first three published detections, the waves were generated by the coalescence of a pair of stellar-mass black holes. When we compare its position reconstruction in the Universe with the previous events, the sky localization of GW170814 is the narrowest. This new and exciting result was reached through a triple-coincident detection, coordinated by a body of more than 1,000 international scientists forming the LIGO and Virgo Collaboration (LVC).
The interactive skymap shows you the huge improvement of this detection in the context of multimessenger astronomy. The tutorial below explains how to use it.
What you see
GW170814 - L1/H1
The blue area represents the sky localization in the case of a double-coincident
detection involving the two LIGO interferometers.
GW170814 - L1/H1/V1
The orange area shows the actual region reconstructed with the three detectors.
It is about 12 times smaller! This enhances the search for any light signals related
to a gravitational-wave phenomenon.
GW170814 - refined skymap
The green area shows how the localization was then progressively refined by more sophisticated algorithms,
further reducing the localization area.
GW150914, GW151226 & GW170104
These display the sky localizations for the other gravitational-wave events detected so far.
Welcome to the era of multimessenger astronomy with a network of advanced interferometers!
For more information, please contact the Education and Public Outreach (EPO): outreachteam_at_ego-gw.it.