Table 3.
Astrometric accuracy of the CduC plates.
| Plate type | σ(αcos(δ)) | σ(δ) | σ(αcos(δ)) | σ(δ) | σ(αcos(δ)) | σ(δ) | σ(αcos(δ)) | σ(δ) | σ(αcos(δ)) | σ(δ) | σ(αcos(δ)) | σ(δ) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| overlap. image | overlap. image | Tycho-2 | Tycho-2 | Gaia TGAS | Gaia TGAS | UCAC5 | UCAC5 | HSOY | HSOY | PMA | PMA | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||
| Single | 0.07″ | 0.05″ | 0.17″ | 0.18″ | 0.19″ | 0.16″ | 0.16″ | 0.15″ | 0.30″ | 0.33″ | 0.27″ | 0.31″ |
| Triple | 0.06″ | 0.06″ | 0.16″ | 0.19″ | 0.16″ | 0.15″ | 0.12″ | 0.13″ | 0.17″ | 0.20″ | 0.26″ | 0.29″ |
Notes. The deviations given are Gaussian 1–σ deviations along RA and Dec (see Figs. 16 and 17). The meaning of the colums: 1: plate type (single or triple exposure), 2–3: deviation of RA and declination for UCAC5 reference stars in the overlapping images, 4–5: deviation of RA and declination for Tycho-2 reference stars in all the images, 6–7: deviation of RA and declination for Gaia TGAS reference stars in all the images, 8–9: deviation of RA and declination for UCAC5 reference stars in all the images, 10–11: deviation of RA and declination for HSOY reference stars in all the images, 12–13: deviation of RA and declination for PMA reference stars in all the images.
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