G-band magnitudes observed by the Gaia Variability programme (Gaia Collaboration 2016, 2023) for all the objects included in the Gaia dataset. In each panel, the observed magnitudes are shown by dots. The shaded region defines the range between the minimum and 85% of it (i.e. the range of the brightest values). The dotted line shows the median of the points included in this range (in magenta), and is assumed to be the G-band magnitude of the stellar photosphere.