A 5.5-year robotic optical monitoring of Q0957+561: substructure in a non-local cD galaxy

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Table 3

Flux ratio in the g band.

Time segment^a	α^b (d)	Best fit	χ²/d.o.f.^c	B/A^d

TS1	6	1.083	46.4/50	1.078–1.089
	9	1.083	53.0/54	1.078–1.088
TS2	6	1.141	40.7/37	1.135–1.146
	9	1.143	61.3/40	–
TS3	6	1.089	41.0/44	1.085–1.094
	9	1.088	52.2/50	1.083–1.092
TS4	6	1.137	126.3/52	–
	9	1.137	152.3/54	–

Notes.

^(a)

See main text.

^(b)

Bin semisize.

^(c)

d.o.f. = degrees of freedom.

^(d)

2σ confidence interval when χ²/d.o.f. < 1.2.

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