Multiwavelength study for 4FGL J0336.0+7502

Within the 95% error region of the LAT source, we identified an optical counterpart with a clear periodicity at P_orb_=3.718178(9)hr using the Bohyunsan 1.8m Telescope, the Lulin One-meter Telescope, the Canada-France-Hawaii Telescope, and Gemini-North.

At the optical position, an X-ray source was marginally detected in the Swift/X-Ray Telescope archival data, and the detection was confirmed by our Chandra/ACIS DDT observation. The spectrum of the X-ray source can be described by a power- law model of {Gamma}_x_=1.6+/-0.7 and F_0.3-7keV_=3.5_-1.0_^+1.2^x10^-14^erg/cm^2^/s. The X-ray photon index and the low X-ray-to-{gamma}-ray flux ratio (i.e., <1%) are both consistent with that of many known BW pulsars.