Table 4
Astrometric calibrations used for the ADI datasets.
| Date | Instrument | Filter | True north corr- | Rotator offset | Pixel scale |
|---|---|---|---|---|---|
| rection angle (°) | position (°) | (mas px−1) | |||
| 2012-03-31 | NICI | L′ | 0.0 ± 0.1b | 180.0 ± 0.1f | 17.95 ± 0.01d |
| 2015-05-03 | IRDIS | H2 | − 1.700 ± 0.076a | −135.99 ± 0.11 | 12.255 ± 0.021a |
| 2015-05-03 | IRDIS | H3 | − 1.700 ± 0.076a | −135.99 ± 0.11 | 12.250 ± 0.021a |
| 2015-05-31 | IRDIS | H2 | − 1.700 ± 0.076a | −135.99 ± 0.11 | 12.255 ± 0.021a |
| 2015-05-31 | IRDIS | H3 | − 1.700 ± 0.076a | −135.99 ± 0.11 | 12.250 ± 0.021a |
| 2016-05-14 | IRDIS | K1 | − 1.675 ± 0.080a | −135.99 ± 0.11 | 12.243 ± 0.021a |
| 2016-05-14 | IRDIS | K2 | − 1.675 ± 0.080a | −135.99 ± 0.11 | 12.238 ± 0.021a |
| 2016-06-01 | NaCo | L′ | 0.518 ± 0.120e | 89.5 ± 0.1c | 27.195 ± 0.063e |
Notes. (a) Maire et al. (2016); (b) assumed value (no astrometric measurement around the NICI epoch available). (c) Adopted from Chauvin et al. (2012), (d) adopted from Hayward et al. (2014) and Wahhaj et al. (2014). (e)Launhardt et al. (in prep.). (f)Cassegrain rotator position angle. There is no information on the uncertainty available; we therefore adopt an uncertainty of 0.1°.
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