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Table 1
Characteristics of various multiplicity surveys in the Hyades.
| Survey | Telescope | Method | Angular resolution | Observed | Binary/Multiple |
|
|
|||||
| Patience et al. (1998) | 5 m Hale telescope | 2.2 μm | 0 11 |
163 | 33 |
| Palomar observatory | speckle imaging | ||||
| Mermilliod et al. (2009) | Swiss 1m telescope | CORAVEL | – | 139 | 25 |
| Haute-Provence Observatory | spectroscopy | ||||
| Morzinski (2011) | Keck and Lick | Adaptive | 006 |
75 | 30 |
| observatories | optics | ||||
| Duchêne et al. (2013) | Keck II | Adaptive | 006 |
9 | 5 |
| optics | |||||
| HST | Hubble Space | Imaging | 005 |
57 | 8 |
| Telescope | |||||
| Hipparcos catalogue | Hipparcos Space | Imaging | 010 |
195 | 22 |
| Mission | |||||
| AstraLux Norte | 2.2 m telescope | Lucky | 011 |
198 | 40 |
| Calar Alto observatory | imaging | ||||
Notes. Some stars were studied by several surveys. The WDS catalog is not presented in the table because its instrument characteristics is inhomogeneous.
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