Fifteen of 97 selected CHIME events need peak changes above 20 MHz to fit one residual plasma delay within three-error time boxes

We test one residual cold-plasma delay with simultaneous intrinsic component emission in CHIME/FRB Catalog 2 release 20251231. We develop a linear feasibility test for bounded peak-frequency changes and component time boxes. Of 97 selected events with at least three components, 15 need peak changes above 20 MHz when each time can change by three quoted errors. Six of 51 events retain this bound after combined band-edge, time, width, and signal cuts. Ten-error time boxes leave 12 of 97 above 20 MHz. An independent pairwise method checks every main bound. Missing peak-frequency errors, model covariance, chromatic beam effects, and component selection prevent a statistical physical rejection. Public plots share the catalog data. Independent telescope work does not confirm these event bounds. No new source or emission process is confirmed. Code, frozen rows, hashes, figures, controls, and offline steps are included.

astronomy · CHIME · fast radio bursts · cold plasma · dispersion measure · bounded errors · component spectra