First light of the VLT planet finder SPHERE - I. Detection and characterization of the substellar companion GJ 758 B

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Table 7

Absolute magnitudes of GJ 758 A, GJ 758 B, and of the candidate companion estimated from the contrast ratio and the model spectrum of the star.

Filter	GJ 758 A^a	GJ 758 B	New c.c.

Y2	4.29 ± 0.03	19.19 ± 0.20	19.74 ± 0.62
Y3	4.23 ± 0.03	18.43 ± 0.10	18.73 ± 0.86
J2	4.09 ± 0.03	19.06 ± 0.25	18.76 ± 0.60
J3	3.94 ± 0.03	16.83 ± 0.18	18.95 ± 0.92
H2	3.64 ± 0.03	16.59 ± 0.12	18.31 ± 0.61
H3	3.59 ± 0.03	18.88 ± 0.42	18.23 ± 0.61
K1	3.58 ± 0.03	17.03 ± 0.21	17.35 ± 0.62
K2	3.57 ± 0.03	17.78 ± 0.35	...

Notes.

^(a)

0.03 mag uncertainty assumed, based on the SED fit of GJ 758 A and on the error in the available optical+WISE photometry of the star.

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