No, these structures would have started being built before we knew knew how to calculate volume. Our radio waves will not reach them for 1300 years. With the degradation of signal, and amplification of noise, we're not sure if what they detect will even be decipherable from noise. They may have discovered a way to communicate that is more efficient, so they may not even be listening on those frequencies.

We found them because they built massive space structures. 1300 years ago, we were invisible.