Example of light curve fit for asteroid (3) Juno. Top: TSSYS-DR1 data as function of time. Observations are plotted as dots, color-coded by epoch. Crosses represent data rejected by the fitting procedure (see text). The line represents the best fit. Middle: same as above, folded over a rotation period (${7.210}_{-0.001}^{0.001}$). Bottom: periodogram showing the residuals of the fit as a function of rotation frequency (number of cycles per day). The horizontal dashed line correspond to the significance threshold (sigma-level, see text).