Photometric data, analysis and figures for RNAAS note on ZTF J191457.72+270231.3

Photometric dataset, analysis products, figures and scripts supportingthe Research Note "Pre-discovery Photometry and Refined Ephemeris ofthe HADS Variable ZTF J191457.72+270231.3" (N. Ruocco, submitted toRNAAS 2026). The archive contains:- 11 nights of CCD photometry of ZTF J191457.72+270231.3 obtained at Osservatorio Nastro Verde (MPC C82, Sorrento, Italy) between 2015 June 11 and 2018 July 14, using a 0.25 m Schmidt-Cassegrain telescope at f/6.3, unfiltered, with SBIG ST-7 and ST-8 CCD cameras (788 photometric points, differential photometry against local comparison stars). These observations pre-date the ZTF discovery of the star by more than three years.- Public survey light curves from ASAS-SN (V, g) and ZTF DR21 (g, r) used in the combined analysis.- Combined and merged dataset (~7000 points spanning 10.1 yr).- Times of maximum extracted from Nastro Verde and ZTF data used for the O-C analysis.- All figures published or referenced in the note.- Python analysis scripts (periodogram, dataset combination, period refinement, O-C, colour variation, VSX revision plot).- Text for the VSX revision submission. Key results:- Refined ephemeris: HJD_max = 2457185.34669 + 0.09425736 x E- Period stable over 39089 cycles; marginal (2.2 sigma) hint of dP/dt = -8e-8 d/yr- Amplitudes: 0.462 mag (ZTF g), 0.325 mag (ZTF r)- Intra-cycle (g-r) colour variation of ~0.17 mag License: Creative Commons Attribution 4.0 International (CC BY 4.0).