X-ray light curve of the AGN (Ptak et al. 1996) of NGC 3147 (NGC 3147-I1). We detected enough photons from this source to build a spectrum at each epoch and convert the count rate to flux. The spectral indexes found at each epoch are listed in Table A.7. The time zero is set to MET = 409627840 s (2013-12-25). The mean flux is 2.3 × 10^-13 erg cm^-2 s^-1. The fit with a constant gives χ² = 141.6 (26 d.o.f.) and a null probability. The UV counterpart of this source is not significantly variable.