Discovery of a brown dwarf companion to the star HIP 64892

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Table 2

Observing log.

UT Date	Instrument	Filter	DIT^a		Δπ^a	True North correction	Plate scale
			[s]		[°]	[°]	[mas pixel⁻¹]
2011-Jun-08	NACO	L′	0.2	8000	130.4	− 0.5 ± 0.1	27.1 ± 0.05
2016-Apr-01	IRDIS	H2/H3	64	64	45	− 1.73 ± 0.06	12.255 ± 0.009
2016-Apr-01	IFS	YJ	64	64	45	− 102.21 ± 0.06	7.46 ± 0.02
2017-Feb-08	IRDIS	K1/K2	64	72	61	− 1.71 ± 0.06	12.249 ± 0.009
2017-Feb-08	IFS	YH	64	72	61	− 102.19 ± 0.06	7.46 ± 0.02

Notes. ^(a) DIT refers to the integration time of each image, N_exp to the total number of images obtained, and Δπ to the parallactic angle range during the sequence.

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