{"coeffs": [-5.640526670026844e-07, -1.6103887668635596e-08, -0.11427448808912521, 0.07716018708510175], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.1934474860725372e-07, 1.0736308193881317e-07, 0.08271900058664104, 0.0765250765985438], "covariance": [[1.4243169020128592e-14, -3.1750376517824597e-15, 4.639638967964067e-09, -5.473975439335841e-09], [-3.1750376517824593e-15, 1.1526831363400311e-14, 3.5170939393246865e-09, 4.668975811274038e-09], [4.639638967964065e-09, 3.517093939324687e-09, 0.006842433058052721, -0.0003322905817051761], [-5.47397543933584e-09, 4.668975811274038e-09, -0.00033229058170517665, 0.005856087348412995]]}