Later accepted TESS Sector 78 data show smaller 30-minute flux changes in the T CrB aperture

We test whether rapid flux changes stayed constant during the May 2024 TESS visit to T Coronae Borealis. We use public two-minute SPOC data and accept only samples with no quality flags. Every sample inside each measured pair must pass the cut. A measure of 30-minute changes, after subtraction of the quoted independent error variance, falls from 2.263 to 1.011 parts per thousand between the accepted 3–12 May and 17–21 May intervals. The later value is 0.447 of the earlier value, a decrease of 55.3 percent. Four pixel apertures preserve the decrease. Pointing and background fits remove less than one percent of raw difference power. Three bright nearby comparison targets on the same detector do not show a decrease of this size. We chose the split after inspection of daily variation. The later interval has only four daily bins, and a five-day gap in accepted data prevents an exact change time. This is an exploratory measurement of aperture flux. It does not establish a physical state change or an eruption date. The package preserves original data, source records, code, figures, tables, and checks for reproduction without network access.

T Coronae Borealis · T CrB · TESS · Sector 78 · flickering · rapid flux variation · recurrent nova · public data