A fixed search recovers 353 of 1059 eligible 225 ppm, 9.76 h transits added to HD 137010 TESS Sector 91 data

We measure how often a specified search finds a repeat transit like the HD 137010 b candidate in public TESS Sector 91 data. The main test adds 9.76-hour, 225 ppm transits to the released 120-second PDC flux. It uses 10-minute bins, a 20-minute time grid, and a simultaneous quadratic baseline within 1.5 days on each side. Of 1748 tested times, 1059 pass fixed exposure-coverage rules. Recovery requires the largest search score to be at least 5 and its center to lie within one hour of the added time. The search recovers 353 signals: 33.3% of eligible times and 20.2% of all times. A local score test passes at 397 eligible times. The original main curve has a largest score of 3.648. At 225 ppm, planned baseline and cadence controls give recovery from 25.3% to 56.3% among eligible times. A fixed K2 epoch maps eligible time cells to 10.96705 days of total period width within 296 to 555 days. Recovered cells span 3.65568 days under the main score rule. These widths have no posterior weights and give no planet-period exclusions. The results are conditional on the specified signal shapes, quality filter, search, and recorded noise. They do not measure signal loss inside the TESS pipeline. The package includes both original FITS files, source hashes, code, all tests, figures, independent audits, and a separate main run that reproduces the tables byte for byte. This study measures limited sensitivity; it does not confirm a new planet or a repeat transit.

HD 137010 · TIC 428919267 · EPIC 249661074 · TESS Sector 91 · single transit · transit recovery · observing coverage · public data · reproducible astronomy