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Table 1
Log of the 28 VLTI/AMBER observations of Achernar with details on the dates, times, and baseline triplets.
| Object | Date and time | Baseline length | Baseline PA |
| Bproj (m) | PA (°) | ||
|
|
|||
| Observations with AT triplet D0-H0-K0: | |||
| δ Phe | 2009-10-25T01:51 | 63,31,94 | 48,48,48 |
| Achernar | 2009-10-25T02:10 | 64,32,96 | 50,50,50 |
| δ Phe | 2009-10-25T02:27 | 64,32,96 | 55,55,55 |
| δ Phe | 2009-10-25T03:59 | 63,32,95 | 73,73,73 |
| Achernar | 2009-10-25T04:15 | 63,31,94 | 76,76,76 |
| δ Phe | 2009-10-25T04:32 | 62,31,93 | 79,79,79 |
| Achernar | 2009-10-25T04:50 | 61,31,92 | 84,84,84 |
| δ Phe | 2009-10-25T05:11 | 60,30,90 | 86,86,86 |
| Achernar | 2009-10-25T05:28 | 60,30,89 | 92,92,92 |
| δ Phe | 2009-10-25T05:48 | 58,29,87 | 93,93,93 |
| Achernar | 2009-10-25T06:04 | 57,29,86 | 99,99,99 |
| δ Phe | 2009-10-25T06:21 | 55,27,83 | 100,100,100 |
|
|
|||
| Observations with AT triplet G1-D0-H0: | |||
| δ Phe | 2009-10-25T23:53 | 44,60,63 | −85,22, − 20 |
| Achernar | 2009-10-26T00:11 | 45,62,58 | −93,24, − 20 |
| Achernar | 2009-10-26T01:01 | 51,63,60 | −83,35, − 14 |
| δ Phe | 2009-10-26T01:18 | 56,62,65 | −71,42, − 10 |
| Achernar | 2009-10-26T01:38 | 55,64,60 | −76,44, − 9 |
| δ Phe | 2009-10-26T01:58 | 60,63,66 | −66,50, − 5 |
| Achernar | 2009-10-26T02:29 | 60,64,61 | −67,55, − 3 |
| δ Phe | 2009-10-26T03:14 | 66,64,66 | −54,65,4 |
| Achernar | 2009-10-26T03:29 | 65,64,61 | −56,67,5 |
| δ Phe | 2009-10-26T03:52 | 68,63,65 | −49,72,8 |
| Achernar | 2009-10-26T04:09 | 67,63,60 | −49,76,10 |
| δ Phe | 2009-10-26T04:27 | 70,62,65 | −43,79,12 |
| Achernar | 2009-10-26T04:45 | 68,62,60 | −43,83,15 |
| δ Phe | 2009-10-26T05:04 | 71,61,64 | −37,85,16 |
| Achernar | 2009-10-26T05:22 | 69,60,59 | −36,91,19 |
| δ Phe | 2009-10-26T05:43 | 71,58,63 | −30,93,20 |
| Achernar | 2009-10-26T06:01 | 70,57,57 | −29,99,24 |
| δ Phe | 2009-10-26T06:18 | 71,56,61 | −24,100,24 |
|
|
|||
| Observations with AT triplet K0-G1-A0: | |||
| δ Phe | 2009-10-30T03:11 | 85,88,128 | −155, −71, −112 |
| Achernar | 2009-10-30T03:32 | 80,87,127 | −151, −70, −108 |
| δ Phe | 2009-10-30T03:54 | 83,90,126 | −149, −63, −104 |
| Achernar | 2009-10-30T04:15 | 77,89,124 | −145, −62, −100 |
| δ Phe | 2009-10-30T04:35 | 81,90,123 | −144, −56, −97 |
| Achernar | 2009-10-30T04:55 | 75,90,121 | −139, −54, −92 |
| δ Phe | 2009-10-30T06:00 | 73,90,110 | −134, −39, −81 |
| Achernar | 2009-10-30T06:20 | 67,90,110 | −128, −36, −73 |
| δ Phe | 2009-10-30T06:40 | 69,89,102 | −130, − 31, − 72 |
| Achernar | 2009-10-30T07:00 | 62,90,104 | −123, −27, −63 |
| δ Phe | 2009-10-30T07:20 | 63,88,93 | −127, −22, −62 |
| Achernar | 2009-10-30T07:42 | 55,90,97 | −117, −18, −52 |
| δ Phe | 2009-10-30T07:59 | 57,87,85 | −123, −13, −52 |
| Achernar | 2009-10-30T08:16 | 50,89,92 | −113, −10, −42 |
| δ Phe | 2009-10-30T08:32 | 51,86,78 | −121, −5, −41 |
| Achernar | 2009-10-30T08:56 | 43,89,87 | −107, − 1, − 29 |
|
|
|||
| Observations with AT triplet H0-G0-E0: | |||
| δ Phe | 2009-11-01T00:22 | 31,15,46 | −145, −145, −145 |
| Achernar | 2009-11-01T00:50 | 32,16,47 | −141, −141, −141 |
| δ Phe | 2009-11-01T01:08 | 31,16,47 | −135, −135, −135 |
| Achernar | 2009-11-01T01:25 | 32,16,48 | −133, −133, −133 |
| δ Phe | 2009-11-01T01:47 | 32,16,48 | −127, −127, −127 |
| Achernar | 2009-11-01T02:04 | 32,16,48 | −125, −125, −125 |
| δ Phe | 2009-11-01T02:22 | 32,16,48 | −120, −120, −120 |
| Achernar | 2009-11-01T02:40 | 32,16,48 | −117, −117, −117 |
| δ Phe | 2009-11-01T02:59 | 32,16,48 | −113, −113, −113 |
| Achernar | 2009-11-01T03:16 | 32,16,48 | −110, −110, −110 |
| δ Phe | 2009-11-01T03:34 | 32,16,48 | −106, −106, −106 |
| Achernar | 2009-11-01T03:50 | 31,16,47 | −103, −103, −103 |
Notes. The calibration star is δ Phe.
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