Contribution of compact objects to the halo mass: Top: number of events expected from a halo S-model entirely composed of compact objects of mass M: blue (green) line, from source objects monitored only by MACHO (EROS-2); orange line, from source objects monitored by both surveys; full red line shows the total; black line shows the total adding the constraint t_E > 200 days in the analysis. Bottom: 95% CL upper limits on the fraction of the halo mass in the form of compact objects f = τ_LMC/4.7 × 10⁻⁷. Limits obtained in this analysis are shown in red, and in black if we require that t_E > 200 days. The gray curves correspond to the latest limits published by MACHO, EROS-2 and OGLE-III.