Two pixel models place three TOI-3724.01 dips within one arcsecond of the target image

We test the source of three known dips of TOI-3724.01, also called TIC 143642240. We use public TESS pixel data from Sectors 19, 59, and 73. Prior SCI work supplied the fixed event times and shapes. A local time fit gives an image of the lost light for each event. We fit an archive camera response and an observed target image. All six primary position estimates lie within 0.94 arcsec of the target image. Gaia DR3 lists a neighbor at 1.73 arcsec. Block sign trials give conditional noise radii, with the spatial reference held fixed. Changes to the baseline and pixel support move the Sector 19 archive position as far as 4.48 arcsec from the target. At other times, selected artificial events have position errors from 0.37 to 17.74 arcsec. These tests do not give a secure choice between the target and its close neighbor. The result is a spatial measurement and a test of its limits. It does not validate a planet or explain the event times. The package preserves pixel subsets, source hashes, camera models, catalog data, code, figures, and checks needed to reproduce the fits.

TOI-3724.01 · TIC 143642240 · TESS · difference image · source position · blend · reproducible data