Archival photometry of SRGA J213151.5+491400 in 2015−2022. The observations are (1) Gaia (blue); (2) ATLAS c (light pink); (3) ZTF g (red), r (light green) and i (yellow). The photometric and spectroscopic observations obtained from TUG (Türkiye) are represented with pink and green squares, respectively, while those obtained from SAO (Russia) are represented with black and blue squares. The vertical solid lines at MJD 58789, MJD 59003, and MJD 59378 indicate the dates of the Gaia alert, ART-XC detection and NICER start time, respectively.