Order 75 has a fitted amplitude of 58.5 m/s at 365.25 days relative to a fixed reference in 345 GJ 411 CARMENES spectra

We test public CARMENES DR1 order velocities for GJ 411. We select 345 spectra from 2016 to 2020. Each order is compared with a fixed weighted reference from all 42 populated orders. A velocity shared by all orders cancels from each difference. Physical order 75, array index 43, has a fitted semi-amplitude of 58.52 m/s at a fixed period of 365.25 days. The fit includes a constant and linear trend. Fits that omit one observing year give 53.76 to 62.44 m/s. A residual sign test uses the largest fit gain over all 42 orders. With 90-day blocks, 9 of 49,999 draws reach the observed gain. The tail probability is 0.00020 under this approximate block model. It assumes independent blocks with errors symmetric under a shared sign change. The test does not cover all period or model choices. In two band differences, the 215.7-day candidate test has a 30-day block probability of 0.07508. With annual and half-year terms, this probability is 0.30860. The result does not confirm or reject the planet candidate. Earlier work reported annual changes in GJ 411 activity indices. We locate a large order difference and release fixed-weight diagnostics. We do not identify its cause or measure an error of this size in the final scalar stellar velocity. The package contains derived data, code, figures, source records, and reproduction instructions. A fresh source download gives the same results. Separate QR fits check the results from the derived data.

GJ 411 · Lalande 21185 · CARMENES DR1 · radial velocity · spectral orders · annual variation · chromatic diagnostics · fixed weights · block bootstrap · reproducible data