Stellar mass fraction maps of NGC 3115 in six age bins, obtained by projecting the stellar model weighting distribution solution, obtained with pPXF, onto the grid parameters (Age, [Z/H]). For each panel, the age bin limits are indicated in the top left corner, the mean stellar mass fraction in the top right corner, and the colour scheme by the colour bar at the top of the figure. Spaxels containing a stellar mass fraction lower than 0.03 are masked and are considered below our uncertainties. The galaxy orientation is similar to Fig. 3. The extended star formation history of the outer disc component is clearly visible in the first four panels (a) to d)), whereas the stars present in the spheroid were formed early (age ≥ 10 Gyr), with more than 85% of its stellar mass formed between 12−14 Gyr (panels e) and f)).