Table 1.
Summary of the VLTI/AMBER observations of Arcturus and the calibrator α Cen A.
| # | tobs | Bp | PA | Seeing | τ0 | DIT × Nf × Nexp |
|---|---|---|---|---|---|---|
| (UTC) | (m) | (°) | (″) | (ms) | (ms) | |
| B2–C1/C1–D0/B2–D0 | B2–C1/C1–D0/B2–D0 | |||||
| Arcturus: 2014 February 11 (UTC) | ||||||
| 1 | 07:45:14 | 7.3/14.6/21.8 | 21/21/21 | 0.83 | 5.4 | 120 × 500 × 5 |
| α Cen A: 2014 February 11 (UTC) | ||||||
| C1 | 05:02:03 | 10.07/20.17/30.23 | 165/165/165 | 1.02 | 4.8 | 120 × 500 × 5 |
| C2 | 05:36:38 | 10.14/20.32/30.46 | 171/171/171 | 0.97 | 5.0 | 120 × 500 × 5 |
| C3 | 06:51:22 | 10.19/20.40/30.59 | 3/3/3 | 0.94 | 4.9 | 120 × 500 × 5 |
| C4 | 07:26:01 | 10.15/20.33/30.48 | 9/9/9 | 0.82 | 5.5 | 120 × 500 × 5 |
| C5 | 08:02:11 | 10.07/20.18/30.25 | 14/14/14 | 1.26 | 3.5 | 120 × 500 × 5 |
Notes.Bp: Projected baseline length. PA: Position angle of the baseline vector projected onto the sky. DIT: Detector integration time. Nf: Number of frames in each exposure. Nexp: Number of exposures. The seeing and the coherence time (τ0) were measured in the visible.
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