Photometry of the eclipsing binary Gaia DR3 397313543218756864 (2014-2025): ZTF, Gaia DR3 epoch photometry and a prediscovery C82 time series

Photometric dataset for the eclipsing binary Gaia DR3 397313543218756864 (= 2MASS J01303376+4521405, Andromeda), supporting the Research Note "The Eclipsing Binary Gaia DR3 397313543218756864: Correction of a Period Alias in the Gaia DR3 Variability Catalogue" (N. Ruocco). The Gaia DR3 variability catalogue lists this star as a generic eclipsing binary (type E) with a period of 0.215394 d and no epoch. The data collected here show that the published period is an alias and that the system is an EA (Algol-type) binary with the revised ephemeris HJD (Min I) = 2459358.6419 + 0.871246 x E, eclipse duration ~9%, nearly equal minima (Min II at phase 0.50) and ranges g 17.98-18.72, r 16.95-17.67, i 16.50-17.18. Contents:- master_photometry_2014_2025.csv: combined photometry (2021 points, 2014-2025) from ZTF (g/r/i, 1821 clean epochs via IRSA/SNAD), Gaia DR3 epoch photometry (G/BP/RP, via ESA DataLink) and a prediscovery unfiltered CCD session, with orbital phases and alignment offsets to the ZTF-r out-of-eclipse level.- C82_20181116_unfiltered_raw.csv: original unfiltered CCD time series obtained at the Osservatorio Astronomico "Nastro Verde" (MPC C82, Sorrento, Italy) on 2018 November 16 (121 points, 10.25 h), covering a complete primary eclipse; time of minimum HJD 2458439.4726 +/- 0.002, in agreement with the revised ephemeris within 6 minutes over 1055 cycles.- C82_20181116_ZTFr_scale.csv: the same session calibrated to the ZTF-r scale.- figure1_master_photometry.png: all photometry phased with the single revised ephemeris.- README.txt: column descriptions and data provenance. ZTF data: Masci et al. 2019, PASP 131, 018003 (retrieved via the IRSA light-curve service and the SNAD viewer, Malanchev et al. 2023). Gaia data: Gaia Collaboration et al. 2023, A&A 674, A1; Eyer et al. 2023, A&A 674, A13. ASAS-SN Sky Patrol data were examined but excluded (below the survey detection limit for this target).