GRAVITY Collaboration,
R. Abuter,
A. Amorim,
M. Bauböck,
J. P. Berger,
H. Bonnet,
W. Brandner,
V. Cardoso,
Y. Clénet,
P. T. de Zeeuw et al. (46 more)
A&A, 636 (2020) L5
Published online: 16 April 2020
DOI: 10.1051/0004-6361/202037813
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