Imaging the disc rim and a moving close-in companion candidate in the pre-transitional disc of V1247 Orionis

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Table 2

Sparse aperture masking binary fit results – H + K band.

Filter	Date	Separation	PA	Contrast	Significance	Detection limits (99%)
	(dd/mm/yy)	(mas)	(°)	(mag)	(σ)	20–40	40–80	80–160	160–240
H	10/01/2012	59 ± 4	93 ± 4	6.0 ± 0.3	3.20	5.60	5.64	5.51	5.47
K′	09/01/2012	44 ± 4	308 ± 3	5.1 ± 0.2	7.01	4.58	5.44	5.30	5.14

H	18/12/2012	40 ± 5	353 ± 3	4.5 ± 0.2	6.91	4.20	4.96	4.73	4.55
Ks	18/12/2012	81 ± 4	23 ± 3	5.3 ± 0.2	5.06	2.75	4.60	4.53	2.69

K′	20/10/2013	75 ± 5	38 ± 3	6.1 ± 0.3	3.83	5.05	5.89	5.78	5.69

Notes. Detection limits are calculated for a range of annuli centred on the central star, namely for radii 20–40, 40–80, 80–160 and 160–240 mas. Limits are quoted in units of Δmag between the central star and a hypothetical companion.

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