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Table 1
Log of the SPHERE observations.
| NR | ||
|---|---|---|
| Mira | ||
| Airmass | 1.077–1.083 | |
| Seeing | 0.62–0.87 arcsec | |
| ND filter | None | |
| DIT | 1.25 | |
| NDIT | 18 | |
| Exp. time | 27 min | |
| HD 12642 | ||
| Airmass | 1.141–1.159 | |
| Seeing | 0.76–0.83 | |
| ND filter | ND_1 | |
| DIT | 5.0 | |
| NDIT | 8 | |
| Exp. time | 16 min | |
| cnt748 + cnt820 | ||
| Mira | ||
| Airmass | 1.083–1.111 | |
| Seeing | 0.67–0.78 | |
| ND filter | ND_1 | |
| DIT | 1.6 | |
| NDIT | 20 | |
| Exp. time | 25.6 min | |
| HD 12642 | ||
| Airmass | 1.162–1.188 | |
| Seeing | 0.73–0.83 | |
| ND filter | ND_1 | |
| DIT | 5.0 | |
| NDIT | 10 | |
| Exp. time | 10 min |
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