Colour and light curves of Nova Vul 2024. The Strömgren y-band magnitude and the Hα emission-line flux, expressed in magnitudes, are obtained by integrating the flux-calibrated spectra. Black dots are ZTF g magnitudes rescaled to AAVSO V magnitudes by adding a −1 mag offset. The observing epochs are counted as days passed since optical maximum (2024 Jul. 30.8 UT). The green ticks in the V-band panel mark the epoch of Echelle observations, while the blue ticks are the epochs of low resolution spectra. The arrows point to epochs of spectra shown in Fig. 7 that were obtained at minima and maxima during oscillation period.