Figure 4. Time evolution measured in hours before the merger of the EM luminosity at 100M when M = 108 M and B0 = 104 G. The thick lines refer to the total luminosity, while the thin ones to the luminosity in a polar cap of 5◦ semi-opening angle, measured using either expression (39) (red solid line), expression (40) (blue dotted line), or the flux using the Poynting vector in (41) (black dashed line). The left panel refers to the binary of non-spinning BHs (i.e., s0), while the right one to the binary with spinning BHs (i.e., s6). Note that in this latter case a certain eccentricity is detectable in the EM luminosity, although it is much smaller in the GW luminosity.
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