Thirty-day error blocks raise search-tail fractions for the 41-day GJ 3293 residual in three velocity reductions

We search public GJ 3293 radial velocities for an extra signal. Three reductions of 204 matched HARPS spectra retain a 41.0335-day residual after a fit of four known periods and two harmonics per period. In 2,000 conditional sign draws per case, replacing night blocks with 30-day blocks raises the search-tail fraction from 0.00050 to 0.06097 in published velocities, from 0.00250 to 0.03148 in RVBank SERVAL, and from 0.00350 to 0.01000 in RVBank DRS. The 41-day rotation period is known, and H-alpha in the same spectra varies at this period. Exact orbit fits also show model dependence. The reductions share spectra. The sign tests hold periods fixed and do not calibrate a physical activity model. No new planet or independent confirmation is reported. Code, source tables, hashes, results, figures, and offline instructions are included.

astronomy · GJ 3293 · HARPS · stellar activity · radial velocity · block bootstrap · null discovery result