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Table 2
GJ 504b astrometry.
| Date | Instrument | Filter | Platescale | True North | Sep | PA |
|---|---|---|---|---|---|---|
| (mas/pixel) | (deg) | (mas) | (deg) | |||
| 26/03/2011 | HiCIAO | H | 9.500 ± 0.005 | 0.35 ± 0.02 | 2479 ± 16 | 327.94 ± 0.39 |
| 22/05/2011 | HiCIAO | H | 9.500 ± 0.005 | 0.35 ± 0.02 | 2483 ± 8 | 327.45 ± 0.19 |
| 12/08/2011 | IRCS | L′ | 20.54 ± 0.03 | 0.28 ± 0.09 | 2481 ± 33 | 326.84 ± 0.94 |
| 28/02/2012 | HiCIAO | Ks | 9.500 ± 0.005 | 0.35 ± 0.02 | 2483 ± 15 | 326.46 ± 0.36 |
| 12/04/2012 | HiCIAO | J | 9.500 ± 0.005 | 0.35 ± 0.02 | 2487 ± 8 | 326.54 ± 0.18 |
| 25/05/2012 | IRCS | L′ | 20.54 ± 0.03 | 0.28 ± 0.09 | 2499 ± 26 | 326.14 ± 0.61 |
| 05/05/2015 | SPHERE | H2 | 12.255 ± 0.009 | 1.712 ± 0.063 | 2491 ± 3 | 323.46 ± 0.07 |
| 03/06/2015 | SPHERE | H2 | 12.255 ± 0.009 | 1.712 ± 0.063 | 2496 ± 3 | 323.50 ± 0.07 |
| 05/06/2015 | SPHERE | K1 | 12.267 ± 0.009 | 1.712 ± 0.063 | 2497 ± 4 | 323.60 ± 0.10 |
| 06/06/2015 | SPHERE | Y 2 | 12.283 ± 0.009 | 1.712 ± 0.063 | 2495 ± 5 | 323.50 ± 0.14 |
| 06/06/2015 | SPHERE | Y 3 | 12.283 ± 0.009 | 1.712 ± 0.063 | 2501 ± 3 | 323.49 ± 0.07 |
| 07/06/2015 | SPHERE | J3 | 12.261 ± 0.009 | 1.712 ± 0.063 | 2499 ± 6 | 323.40 ± 0.14 |
| 29/03/2016 | SPHERE | H2 | 12.255 ± 0.009 | 1.78 ± 0.08 | 2495 ± 2 | 322.48 ± 0.05 |
| 29/03/2016 | SPHERE | H3a | 12.255 ± 0.009 | 1.78 ± 0.08 | 2493 ± 12 | 322.83 ± 0.32 |
| 10/02/2017 | SPHERE | H2 | 12.255 ± 0.009 | 1.719 ± 0.056 | 2493 ± 3 | 321.74 ± 0.08 |
Notes. HiCIAO and IRCS astrometry from Kuzuhara et al. (2013). (a)Tentative re-detection at H3.
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