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Using publicly available gamma-ray observations of Saggitarius A* (Sgr A*),we constructed its ~6 months (from 2022 June 22 to 2022 December 19) lightcurve and subsequently we built its associated periodogram to search for aclear periodical signal. The lightcurve was constructed using the Fermitoolspackage from observations of the Fermi satellite. The associated periodogramwas built using the R-package RobPer algorithm, through a two-stepmodel-fitting procedure employing the unweighted tau-regression method. Toreduce the likelihood of false positive detections, we incorporated a WindowFunction method into our analysis. We identify a clear significant peak on theperiodogram at 76.32 minutes. The found periodicity is consistent with twoother works in the literature at different wavelengths, supporting the idea ofa unique oscillatory physical mechanism.

A 76 minute gamma-ray periodicity in Sagittarius A*