{"coeffs": [-1.3297955019776067e-07, 1.9813617333452862e-09, -0.29813149985381737, 0.001199142738627333], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.491983971227153e-08, 8.3414541714828e-09, 62025.64048963574, 14036.260775633727], "covariance": [[2.226016170398746e-16, 8.100170331314684e-27, 0.00037756820039622495, -8.544282087983794e-05], [4.334841102702672e-27, 6.957985769494782e-17, 5.91790556236239e-11, 2.183749756516609e-12], [0.00037756820039766884, 5.924425171347285e-11, 3847180078.1495404, -870608064.6880993], [-8.544282087980163e-05, 2.182026709230434e-12, -870608064.6880994, 197016616.56159395]]}