Table 1
Basic information about the XO-2 stellar binary system.
| Parameter | XO-2N | XO-2S | Ref. |
|
|
|||
| UCAC4 ID | 702-047113 | 702-047114 | (1) |
| RA (J2000) | 07:48:06.471 | 07:48:07.479 | (1) |
| Dec (J2000) | +50:13:32.91 | +50:13:03.25 | (1) |
| Near UV (mag) | 18.153 ± 0.047 | 17.988 ± 0.044 | (2) |
| B (mag) | 12.002 ± 0.015 | 11.927 ± 0.015 | (3) |
| V (mag) | 11.138 ± 0.026 | 11.086 ± 0.025 | (3) |
| Rc (mag) | 10.669 ± 0.020 | 10.631 ± 0.019 | (3) |
| Ic (mag) | 10.243 ± 0.012 | 10.216 ± 0.013 | (3) |
| J (mag) | 9.744 ± 0.022 | 9.742 ± 0.022 | (4) |
| H (mag) | 9.340 ± 0.026 | 9.371 ± 0.027 | (4) |
| Ks (mag) | 9.308 ± 0.021 | 9.272 ± 0.021 | (4) |
| Distance (pc) | 145.5 |
148.0 |
(5) |
| μα (mas yr-1) | −31.9 ± 3.0 | −29.9 ± 3.6 | (1) |
| μδ (mas yr-1) | −156.2 ± 3.3 | −156.2 ± 3.6 | (1) |
| U (km s-1) | 70.39 |
71.05 |
(5) |
| V (km s-1) | −76.0 |
−77.65 |
(5) |
| W (km s-1) | −2.91 |
−3.46 |
(5) |
|
|
|||
| Relative magnitudes (XO-2N – XO-2S) | |||
|
|
|||
| Δ B (mag) | 0.075 ± 0.002 | (6) | |
| Δ V (mag) | 0.057 ± 0.002 | (6) | |
| Δ Rc (mag) | 0.040 ± 0.002 | (6) | |
| 0.041 ± 0.004 | (7) | ||
| Δr′ (mag) | 0.038 ± 0.001 | (8) | |
| ΔIc (mag) | 0.031 ± 0.003 | (6) | |
| 0.030 ± 0.006 | (9) | ||
Reference. (1) UCAC4 catalogue (Zacharias et al. 2013); (2) Bianchi et al. (2011); (3) APASS all-sky survey (Henden & Munari 2014); (4) 2MASS catalogue (Skrutskie et al. 2006); (5) this work; (6) this work (Serra La Nave Observatory); (7) this work (TASTE project); (8) Kundurthy et al. (2013), λ0 = 626 nm, 4 epochs; (9) this work (APACHE project).
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