Ground-based Light Curve Follow-Up Validation Observation of TESS Object of Interest TOI 5147.01

This paper covers the follow-up observation of TESS Object of Interest TOI 5147.01. TOI 5147.01 was first observed by TESS in 2019. The object has been observed with a full transit period in a series of observations, starting in 2022. Our observation aimed to confirm this transit and check for nearby eclipsing binary stars. The target was observed utilizing George Mason University (GMU) 0.8 m telescope, with science, dark, and flat images taken the night of transit. The target was observed during the transit period on February 19th, 2024. The images taken were processed using plate-solving and multi-aperture photometry, within AstroImageJ. Combining Gaia star analysis with a Nearby Eclipsing Binary (NEB) check demonstrates a minimal likelihood of eclipsing binary stars. The predicted transit falls within the predicted ingress and egress times, with a noticeable dip in light from the host star, indicating a transit. However, the transit time is less than the predicted transit time, and the depth is less than the predicted depth. The transit model fits well with a RMS of 3.93 and a χ2/dof value of 1.2. TOI 5147.01 demonstrates a very strong likelihood of being an exoplanet, due to a noticeable transit being observed with a low likelihood of a nearly eclipsing binary.