A fixed merger template gives no excess delayed-copy score 4 to 12 seconds after GW170814

We test for a delayed copy of GW170814 with one fixed non-spinning merger template in two LIGO detectors. The search covers 4 to 12 seconds after the event. All three filter settings give scores below the empirical 99 percent noise threshold. Ranks against 246 control intervals give p values from 0.202 to 0.425. The main test detects the known merger and recovers 31 of 40 copies at half the fitted model amplitude, and 39 of 40 at three quarters. Nearby controls give similar null ranks. Finite filter support prevents direct leakage from the main merger into the search. Both files carry a continuous-wave hardware-injection flag. One approximate template, noise drift, a small background sample and restricted delays limit the result. No new source, planet or lens is found. Code, aggregate evidence, input hashes, external-data notices and retrieval steps are included.

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