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We present an extension of a previously suggested test of all modifiedtheories of gravity that would reproduce MOND at low accelerations. In a classof models, called "dark matter emulators", gravitational waves and otherparticles couple to different metrics. This leads to a detectable time lagbetween their detection at Earth from the same source. We calculate this timelag numerically for any event that occurs in our galaxy up to 400 kpc, andpresent a graph of this possible time lag. This suggests that, gravitationalwave observers might have to consider the possibility of extending theiranalysis to non-coincident gravitational and electromagnetic signals, and thegraph that we present might be a useful guideline for this effort.

A useful guide for gravitational wave observers to test modified gravity models