Fixed detector-response tests find no excess GW170814 copy at delays of 12 to 20 seconds

We test public H1, L1, and V1 strain for a delayed copy of GW170814. One approximate merger waveform and detector response ratios fitted to the main event define the test. Two network choices and three filter settings give control ranks from 0.193 to 0.346. No target passes the 99 percent threshold from 242 control windows. In the main filter setting, both networks recover 62 of 62 copies at half the fitted main-event amplitude in reserved noise windows. Direct waveform addition checks the injection calculation. The result is a restricted null result. No new source, planet, lens, or unexplained signal is found. Noisy fitted responses, one waveform, hardware injections, small control samples, and shared filter support limit the result. Code, aggregate scores, exact data hashes, figures, and external retrieval steps are included.

astronomy · GW170814 · delayed copies · gravitational lensing · Virgo · null result · injection recovery