A spacing test finds no clear excess clustering in 26 selected Nancay observations of FRB 20220912A

We test internal gaps between detected episodes of FRB 20220912A in public Nancay data. A conditional uniform placement model fixes counts, endpoints and a one-second minimum gap within each observation. The main test uses 560 gaps in 26 observations. Its weighted spacing statistic is 1.06164, with upper-tail probability 0.05550 and two-sided probability 0.11100. A high-signal subset has nominal excess inequality, but no test passes a six-test Holm correction. Separate 900-second blocks give no clear excess. These local controls also change the sample. Simulations recover strong conditional gap-shape changes. The null is exact for the stated episode placement law, not for every grouped Poisson detection process. Missing bursts, rate trends, grouping and sensitivity changes limit physical claims. No new source or mechanism is confirmed. Original code, aggregate evidence, exact external hashes and retrieval steps are included.

astronomy · FRB 20220912A · Nancay · clustering · conditional spacings · null result