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Table 2
Astrometric (α, δ) reduction by telescope.
| Mean errors | UCAC4 | Gaus. Errors | |||
| Telescope | σ α | σ δ | stars | x | y |
| mas | mas | mas | mas | ||
|
|
|||||
| PE(OPD) | 51 | 48 | 24 | 15 | 15 |
| B&C (OPD) | 56 | 55 | 36 | 29 | 29 |
| Zeiss (OPD) | 58 | 57 | 95 | 26 | 26 |
| OHP | 50 | 49 | 46 | 26 | 26 |
| ESO | 26 | 25 | 632 | 15 | 15 |
Notes. Mean errors are the standard deviations in the (O−C) residuals from (α, δ) reductions with the UCAC4 catalog. Gaussian errors are the errors in the Gaussian fit used to perform the (x, y) measurements.
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