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

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Table 3

Sparse aperture masking binary fit results – L-band.

Filter	Date	Separation	PA	Contrast	Significance	Detection limits (99%)
	(dd/mm/yy)	(mas)	(°)	(mag)	(σ)	20–40	40–80	80–160	160–240
L′	10/01/2012	114 ± 9	329 ± 4	6.0 ± 0.3	3.30	3.73	5.37	5.74	5.61
L′	18/12/2012	117 ± 4	22 ± 2	5.34 ± 0.15	8.28	3.96	5.44	6.11	6.14
L′	16/11/2013	118 ± 7	26 ± 3	5.8 ± 0.3	4.16	3.76	5.39	5.79	5.71

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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