Trials recover transits of 1.8 Earth radii at all 240 grid points in TESS sectors 50–52 of GJ 3942 under a uniform star model

We test transit sensitivity near the 6.905 day period of GJ 3942 b. The data are TESS SPOC sectors 50–52. A box search from 6.785 to 7.025 days gives a maximum depth score of 9.44 at 6.9954 days. Of 200 shifted controls, 63 reach or exceed that score. This result does not support a transit detection. We then insert 1,440 trial transits before the study trend filter. Under a circular orbit and a uniform star model, all 240 trials at 1.8 Earth radii pass the timing check. Their scores also exceed every shifted control. The grid has three periods, 40 phases, and impact parameters of 0 and 0.8. The fixed star mass and radius are 0.63 solar masses and 0.61 solar radii. A separate test uses the original exposure times and assumed limb darkening. In that test, 119 of 120 trials exceed every control; all 120 pass the timing check. These tests measure sensitivity after mission processing. They do not give a general limit on the planet radius. The package includes original data, source queries, code, trial results, figures, and repeat instructions.

GJ 3942 · TESS · transit search · injection recovery · correlated noise · radial velocity planets · public astronomy data