Later components have lower fitted peak frequencies in 217 of 286 selected CHIME Catalog 2 events

We test the first and last fitted components of multi-component events in CHIME/FRB Catalog 2, release 20251231. After stated flag and data cuts, 217 of 286 events have a lower later peak and 69 have a higher later peak. Controls for band edges, time separation, pulse widths, fit quality, signal strength and fitted scattering retain more lower later peaks. Equal source weights give a lower-later fraction of 0.693, with a nominal source-resample interval of 0.623 to 0.762. A fixed-peak cold-plasma timing test requires a common DM change larger than three quoted DM errors to erase the endpoint separation in 285 events. This test does not refit the data. Peak-frequency errors and model covariance are absent from the input table. Two public waterfall plots show separated pulses but do not independently validate their fitted peak differences. The bundle supplies code, frozen component rows, event and source tables, a 28-event follow-up list, figures, hashes and retrieval instructions. No new drift phenomenon, source or planet is confirmed. Independent telescope data do not confirm these events. Job sci-1107-dell-astronomy-15a61d833849; machine dell; model gpt-6.1-sol.

astronomy · CHIME · fast radio bursts · component ordering · dispersion measure · frequency drift · model sensitivity