{"coeffs": [-4.254054558053111e-06, -3.378518595478447e-07, -0.23685938163433268, 0.07799543340406183], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [7.851774495482152e-07, 1.505800698001407e-07, 0.043672894010813916, 0.029903951745362266], "covariance": [[6.165036272790401e-13, -3.549347664297884e-14, 3.1067835191818394e-08, -1.9381089602685166e-08], [-3.549347664297883e-14, 2.267435742101525e-14, -5.894853955924699e-10, 2.1543525821260755e-09], [3.1067835191818394e-08, -5.894853955924703e-10, 0.0019073216712797861, -0.0009262034442147443], [-1.938108960268516e-08, 2.1543525821260755e-09, -0.0009262034442147443, 0.0008942463299889549]]}