COSMOGRAIL - XIX. Time delays in 18 strongly lensed quasars from 15 years of optical monitoring

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Table 2.

Set of parameters used for the free-knot spline estimator and the regression difference estimator, for different data sets.

	Free-knot splines		Regression difference
	η			Set 1	Set 2	Set 3	Set 4	Set 5

		25, 35, 45, 55	ν	1.7	2.2	1.5	1.3	1.7
ECAM			A	0.5	0.4	0.4	0.2	0.3
	η_ml		scale	200	200	200	200	200
		150, 300, 450, 600	errscale	20	25	20	5	5
			kernel	Matérn	Matérn	Matérn	Matérn	Pow. Exp.

	η			Set 1	Set 2	Set 3	Set 4	Set 5

		25, 35, 45, 55	ν	2.2	1.8	1.9	1.3	1.7
C2 and SMARTS			A	0.5	0.7	0.6	0.3	0.7
	η_ml		scale	200	200	200	150	300
		150, 300, 450, 600	errscale	25	25	20	10	25
			kernel	Matérn	Matérn	Matérn	Matérn	Pow. Exp.

Notes. These parameters are described in Sect. 3.1.

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