{"coeffs": [5.911615264469389e-07, 0.1975849376362753, 0.6076607035756709, 0.0014863370700761605], "function": "fpl = lambda t, Cl, Cu, A, k: (Cl + ((Cu - Cl) / (1 + numpy.exp((A - t) / k))))", "log_ftol": 1e-08, "errors": [3.447897035623236e-07, 7094888.938883595, NaN, NaN], "covariance": [[1.18879939682595e-13, -8.764780099238869e-09, 6.847484452530366e-11, 6.2329656677426244e-12], [-4.382390049619434e-09, 50337449055092.79, 156606598163.26523, -14907890322.951626], [1.0271226678795549e-10, 323363310706.004, -2526275864.8906565, -411551449.07727855], [4.279677782831479e-12, 0.0, -315784483.11133206, -28230830.22044559]]}