{"coeffs": [-3.2393926919675127e-07, 4.9818180514194e-06, 0.4716043829095169, 0.0006393061081974154], "function": "fpl = lambda t, Cl, Cu, A, k: (Cl + ((Cu - Cl) / (1 + numpy.exp((A - t) / k))))", "log_ftol": 1e-08, "errors": [6.48456173787362e-07, 1.4499920751259172e-06, NaN, NaN], "covariance": [[4.2049540932294543e-13, -1.0941648722048196e-29, -3.0083791816447733e-10, -8.07351174880217e-10], [-2.1883297444096392e-29, 2.1024770179279637e-12, -4.796636745512236e-10, -1.614702349760434e-09], [-4.036755874401085e-10, -4.036755874401085e-10, -30788461001.159718, -42826747021.16503], [-8.07351174880217e-10, -1.614702349760434e-09, -42826747021.16503, -59572002002.496346]]}