Eleven TESS sectors of LHS 3844 show no box dip above S/N 8 at periods of 6.673–6.715 or 6.8653–6.8929 days and durations of 0.5–2 hours

We tested two proposed radial velocity periods for a second planet around LHS 3844. We used 11 public TESS sectors and masked the known planet. Six sectors add data beyond the earlier published transit search. We searched 6.673-6.715 and 6.8653-6.8929 days, with box durations from 0.5 to 2 hours. The largest depth divided by its formal error was 5.98 with 0.5-day baseline bins and 6.57 with 1-day bins. Neither search reached the set threshold of 8. We added 1,728 circular transit models before our baseline correction. The main recovery test fixed each injected period and searched all phases. All tested models with radii of 1, 1.25, 1.5, 2 Earth radii were recovered. Each radius had 288 trials across six periods, three impact parameters, and 16 phases. A full interval search agreed with targeted recovery in 24 of 24 fixed validation cases. A control with inverted flux passes the rule in the 6.8758-day range. Two bright events supply 67% of its positive weighted depth evidence. The result applies to this finite model grid in the supplied SPOC flux. It does not establish blind period completeness or exclude a planet that does not transit. It does not decide whether the velocity signal has a planetary cause. The package contains all input light curves, source hashes, code, results, and figures.

LHS 3844 · TESS · transits · radial velocity · injection recovery · public data · null result