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This fit model is suited to fit resonances with a Fano lineshape.
U. Fano, Phys. Rev. 124, 1866 (1961)
For instance, such resonances occur in interference processes, such as the Kondo effect in scanning tunneling spectroscopy.
- y_0: offset in y direction
- x_center: center of the resonance
- A: amplitude
- w: width of the resonance
- m: linear background
- q: Fano factor