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