Using transits to communicate?

[Drashner1]

I've also seen a suggested comm method that uses a similar idea of 'the other guys will likely be looking in this direction'. In this case, the suggestion was that interstellar signals should be placed and timed in relation to supernova, on the theory that astronomers on other worlds would be looking at them and so would be more likely to pick up a signal coming from that same part of the sky.

Todd