  We analyze broadband X-ray data of NGC 6946 X-1 and probe plausible accretion
scenarios in this ULX. NGC 6946 X-1 is a persistent soft source with broadband
continuum spectra described by two thermal disk components. The cool accretion
disk temperature $\rm T_{cool} \sim 0.2$ keV and the presence of $\sim 0.9$ keV
emission/absorption broad feature suggests the evidence of optically thick wind
due to super-critical accretion. The hot geometrically modified accretion disk
has an inner temperature of $\rm T_{hot} \sim 2$ keV with a radial dependent
profile $\rm T(r) \propto r^{-0.5}$, expected in a slim disk scenario. Further,
the measurement based on a realistic inclination angle of the disk indicates
that the mass of the host compact object is comparable to $\rm \sim 6-10
~M_{\odot}$ non-rotating black hole or the system hosts a moderately magnetized
neutron star with $\rm B \lesssim 2 \times 10^{11}$ G magnetic field. Overall,
the detected spectral curvature, high luminosity, flux contribution from two
thermal disk components, and estimated accretion rate imprint the
super-Eddington accretion scenario.
