Light curve of Cygnus X-1 obtained by the analysis of the Fermi-LAT data between August 4, 2008 and February 2, 2016 in 1 d bins. From top to bottom: the integral fluxes in the 0.1–20 GeV energy range, the TS corresponding to the above integral fluxes, the daily light curves in soft and hard X-rays from MAXI (cts s^-1 cm^-2 in 2–20 keV), RXTE-ASM (cts s^-1 in 3–5 keV divided by 10) and Swift-BAT (×10 cts s^-1 cm^-2 in 15–50 keV), and the daily integral fluxes at 15 GHz by AMI. In the 0.1–20 GeV range, days with TS >9 are shown in the top panel as filled black circles, while the purple arrows represent the 95% CL UL for the bins with TS < 9. Dashed black vertical lines show the previously reported gamma-ray flares by AGILE. The horizontal green dot-dashed line in X-ray panel indicates the threshold level of the Swift-BAT count rate used in this work to separate the SS from the HS(+IS): 0.09 × 10 cts s^-1 cm^-2. The shadowed gray bands identify the HS(+IS), and the red bands the SS.