Light curve validation of TESS object of interest 3873.01

The Transiting Exoplanet Survey Satellite (TESS) has identified thousands of TESS Objects of Interest (TOIs), which require follow-up observations from the ground to validate their planetary nature and rule out false positives. This paper presents follow-up photometry of the hot Jupiter candidate TOI 3873.01, orbiting a G-type star. We conducted observations using the 0.8-meter telescope at George Mason University on 2024-06-21 UTC, capturing a full transit event. 156 science exposures were used for analysis after discarding frames with tracking errors. Data were calibrated and processed using AstroImageJ to perform differential aperture photometry. The resulting light curve shows a transit event with a depth of 5.69 ppt and a duration consistent with the predicted ephemeris. A transit model fit to the data yielded a reduced chi-squared (χ²/dof) of 0.86 and a Bayesian Information Criterion (BIC) of 168.4, indicating a good fit to the data. While a Nearby Eclipsing Binary (NEB) check revealed no obvious contaminating sources, the data were insufficient to statistically clear the field. We conclude that the event is consistent with a planetary transit on the target star, but further observations, including spectroscopy and high-resolution imaging, are required for definitive validation.