Two telescope samples show no clear excess width similarity between selected bursts of FRB 20220912A

We test whether consecutive detected bursts have similar widths within a session. CHIME Catalog 2 gives a normalized adjacent-width difference ratio of 0.955, with a nominal 95 percent session-bootstrap interval of 0.711 to 1.337, in 32 pairs from five sessions. A separate Nancay table gives 1.070, with interval 0.986 to 1.153, in 441 pairs from 25 sessions. One is the random-order expectation. Neither sample shows clear excess similarity. Time, frequency, signal strength and wait controls give the same conclusion. The two telescopes measure different width definitions and radio bands. Missed bursts, estimated session boundaries, detection cuts and low power limit the test. The result does not exclude source memory. Code, aggregate evidence, input hashes and a retrieval recipe are included. External raw data and record-level tables are not in the signed package.

astronomy · FRB 20220912A · burst width · temporal memory · CHIME · Nancay · null result