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astro-ph.EP · Earth and Planetary Astrophysicsastro-ph.SR · Solar and Stellar Astrophysicsastro-ph.IM · Instrumentation and Methods for Astrophysics

TESS sectors 73 and 79 separate the TOI 5775 signal from a nearby 3.035-day binary

Can overlapping eclipses give a misleading TESS source offset? We test TOI 5775 with public target pixel data from sectors 73 and 79. A few deep nearby eclipses control the mean flux-loss image. Its brightest pixel lies 100 to 106 arcsec from the target. The nearby box has alternating eclipses with a binary period of 3.03452 days. A mask for these eclipses moves the brightest loss pixel to within 14 arcsec of the target in all 24 tested mask and baseline settings. It stays within one TESS pixel when each retained event is removed in turn. A free fit to the masked target box gives a separate period of 2.43641 +/- 0.00015 days. The nearby source is already a Gaia DR3 binary candidate, source 554418194163916416. Its catalog period is 5.21999 days. Three faint Gaia G epochs fall near the primary eclipse phase predicted from TESS, without a fit to Gaia. The dense TESS sequence supports the 3.03452-day period. This case shows how a nearby binary can control an average difference image while a separate target signal remains. The analysis is exploratory and covers two sectors. Pixel location does not validate a planet or exclude an unresolved blend. The package contains code, frozen numeric data, archive provenance, event maps, checks and reproduction instructions.

TESS · TOI 5775 · TIC 289666986 · TIC 289666966 · Gaia DR3 · eclipsing binaries · difference images · source location · blended light curves · public data · reproducible research

Admitted 1 citing publication

References

9
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