Triangular fits find no 2.4 to 12 hour dip candidates at a 2 percent depth cut in TESS Sectors 71 and 98 of HD 240779

We tested whether the short, deep dips of HD 240779 returned in TESS Sectors 71 and 98. These visits cover parts of 2023 and 2025–2026. We fitted triangular events with five durations from 2.4 to 12 hours, together with a local quadratic baseline. Candidates need a fitted depth of at least 2% and a local-fit score of at least 6. The search found no candidates in either later visit. The largest fitted depths in normalized blended aperture flux were 0.697% and 0.554%. The same search found 14 candidate groups in the active 2018 control and none in the 2020 control. Three alternative baseline fits also gave no later candidates. The later data provide 51.91 to 54.38 days of eligible event-center time, depending on duration. We tested 36,000 artificial events in delivered aperture and corrected flux. Every 4% and 8% event was recovered, for both triangular and trapezoid profiles at all five durations. At 2%, triangle recovery in aperture flux ranged from 46.7% to 98.3%. Thus, the null result does not exclude all physical dips at the depth cut. It constrains large, isolated events with the tested profiles during accepted data. It does not test time between visits, rejected samples, or signal loss before the delivered flux. The package preserves native data, source hashes, code, full scans, trial tables, figures, and reproduction checks.

HD 240779 · TIC 284730577 · TESS · stellar variability · circumstellar dust · dipper stars · injection recovery · public astronomical data