Tests within ten-minute blocks did not detect frequency order at 1–100 s gaps in two FRB 20220912A catalogs

We tested whether successive burst episodes from FRB 20220912A had similar measured frequencies. We used 1,076 FAST bursts and 696 Nançay Radio Telescope bursts. We joined detections with gaps at most 1 second into episodes, retained episodes only when their first frequency was at least 30 MHz inside the observing band, and compared successive retained episodes with 1–100 second gaps. We shuffled frequencies within ten-minute blocks. The null assumes that all orders of the fixed frequencies in each block are equally likely. FAST gave 467 pairs and a squared-difference ratio T of 0.98068. Nançay, with times from candidate filenames, gave 333 pairs and T = 0.94772. The random-order mean is 1. Two-sided p-values were 0.67070 and 0.32602; neither test rejected after Holm correction for two tests. An independent audit found 15 Nançay rows with time-field differences greater than 1 second. These IDs equal the 15-burst subset in Table 2 of the source paper, which labels its times as barycentric. Removal of these rows gave T = 0.94077 and p = 0.26931. All planned diagnostic tests also did not reject. Gaussian simulations show sensitivity to strong persistence and limited power for weaker signals. The tests describe order in selected catalog values. They do not establish independent emission or validate absolute Nançay times. We provide source tables, provenance, code, all pair records, figures, simulation draws, and offline reproduction instructions.

fast radio bursts · FRB 20220912A · frequency order · randomization test · FAST · Nancay Radio Telescope · time audit · reproducible data