{"coeffs": [-3.472222715185329e-08, 2.771796793219888e-06, 0.5130411678824297, 0.12102459564724155], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.6145370113515172e-08, 4.7338164200311004e-07, 0.03538067600004161, 0.009239127040426055], "covariance": [[2.6067297610238895e-16, -6.660550841486346e-15, -5.001143128156787e-10, -1.412549285933998e-10], [-6.660550841486274e-15, 2.2409017898556065e-13, 1.6738771021918534e-08, 4.262785692080038e-09], [-5.001143128156743e-10, 1.6738771021918538e-08, 0.0012517922342199206, 0.00031996195471569784], [-1.4125492859339921e-10, 4.262785692080055e-09, 0.0003199619547156989, 8.536146846913192e-05]]}