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Table 1
GTC/OSIRIS astrometry, photometry (or 3σ lower limits), observing information, and photometry for six Y dwarfs and a T9 + Y0 binary.
| WISE J...(SpT) | RA | Dec | z | Date | ExpT | J | H | z − J | μα cosδ | μ δ |
|
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| hh:mm:ss.sss | °:′:′′ | mag | dd/mm/yy | s | mag | mag | ||||
|
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| 0146 + 4234 (Y0) | 01:46:56.576 | + 42:34:09.80 | 24.10 ± 0.13 | 03/09/12 | 50 × 50 | 19.40 ± 0.25 | 18.71 ± 0.24 | 5.39 ± 0.27 | −0.52 ± 0.08 | −0.11 ± 0.08 |
| 0410 + 1502 (Y0) | 04:10:22.933 | + 15:02:42.91 | 22.66 ± 0.09 | 15/09/12 | 40 × 50 | 19.44 ± 0.03 | 20.02 ± 0.05 | 3.22 ± 0.09 | + 1.20 ± 0.08 | −2.17 ± 0.08 |
| 1405 + 5534 (Y0p) | >23.85 | 06/08/12 | 45 × 50 | 21.06 ± 0.06 | 21.41 ± 0.08 | >2.79 | – | – | ||
| 1738 + 2732 (Y0)a | 17:38:35.585 | + 27:32:58.28 | 22.80 ± 0.09 | 17/06/12 | 30 × 50 | 20.05 ± 0.09 | 20.45 ± 0.09 | 2.75 ± 0.13 | + 0.32 ± 0.10 | −0.39 ± 0.10 |
| 1828 + 2650 (≥Y2) | >24.46 | 09/09/12 | 40 × 50 | 23.48 ± 0.23 | 22.85 ± 0.24 | >0.98 | – | – | ||
| 2056 + 1459 (Y0) | 20:56:29.028 | + 14:59:54.64 | 23.09 ± 0.08 | 15/06/12 | 40 × 50 | 19.94 ± 0.04 | 19.96 ± 0.04 | 3.66 ± 0.09 | + 0.89 ± 0.10 | + 0.61 ± 0.10 |
| 1217 + 1626 (T9+Y0) | 12:17:57.144 | + 16:26:35.99 | 21.60 ± 0.03 | 15/12/12 | 15 × 60 | 17.83 ± 0.02 | 18.18 ± 0.05 | 3.77 ± 0.04 | + 1.41 ± 0.10 | −1.96 ± 0.10 |
Notes. The near-infrared photometry is taken from Leggett et al. (2013), except for the H-band magnitude of WISEJ1828 + 2650 (Kirkpatrick et al. 2012).
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