{"coeffs": [-2.0740273128526553e-07, 4.24974691883901e-09, -0.2949982257379931, 0.015073762181270298], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.767536604160986e-08, 1.6583720967964058e-08, 0.01883700312011968, 0.019226130107195233], "covariance": [[7.659258855370922e-16, -1.7038981017035893e-17, 1.3284150108618334e-10, -1.3587430122610366e-10], [-1.7038981017035887e-17, 2.7501980114329075e-16, 6.13595038610183e-11, 6.612344161877886e-11], [1.3284150108618334e-10, 6.13595038610183e-11, 0.00035483268654739854, 4.7900299390136637e-05], [-1.3587430122610363e-10, 6.612344161877887e-11, 4.7900299390136637e-05, 0.00036964407889879903]]}