Gl 229 HARPS sampling gives more than 0.99 squared overlap between 122-day and third-year extraction waves

We test a possible extraction effect at three reported planet periods for Gl 229. HARPS-RVBank version 02 gives 200 accepted exposures and 197 nightly pairs. The DRS minus SERVAL wave has an amplitude of 0.486 m/s at 122 days. Conditional tests that allow 90-day or 365-day noise blocks do not pass a 0.05 family threshold. After era offsets and quadratic time terms, the squared overlap between the 122-day and 121.75-day wave spaces is 0.9915 to 0.9966. A unit third-year wave gives a fitted 122-day amplitude of 0.993 to 1.004 m/s across 64 phases. Thus this sampling cannot use a small paired difference to assign a unique cause at the fixed 122-day period. The 471-day and 523.2-day differences also lack clear support. This is a sampling and extraction test, not a new planet or a proof of an annual instrument effect. Both products use the same spectra. Code, aggregate results, source hashes, figures and external retrieval steps are included.

astronomy · Gl 229 · HARPS · radial velocity · annual harmonics · extraction difference · sampling