VHE, HE, and X-ray fluxes of 1FGL J1018.6–5856 folded with the orbital period of P = 16.58 d. Two orbits are shown for clarity. Top: VHE integral flux above 0.35 TeV measure by HESS (red circles). For comparison, a scaled light curve from the nearby bright source HESS J1023-589 is shown in grey. Middle top and middle bottom: Fermi-LAT light curve between 1 and 10 GeV (solid blue squares) and between 0.1 and 1 GeV (open blue squares; Ackermann et al. 2012). Bottom: X-ray 0.3–10 keV count-rate light curve from 67 Swift-XRT observations in 2011 (green), 2012 (blue), and 2013 (red).