Table 1
Summary of all the data obtained for VX Sgr and its calibrators.
| Date | UT (a) | Seeing science (b) | tau0 science (c) | Calibrators (d) | Seeing calibrator | tau0 calibrator | AT configuration |
|---|---|---|---|---|---|---|---|
| (arcsec) | (ms) | (arcsec) | (ms) | ||||
| 2019-06-09 | 04:33:19 | 0.6 | 2.8 | ν Oph | 0.6 | 3.4 | K0G2D0J3/compact |
| 2019-06-09 | 05:41:38 | 0.4 | 3.7 | β Sgr/ν Oph | 1.2/0.7 | 2.1/2.2 | K0G2D0J3/compact |
| 2019-06-09 | 07:21:32 | 0.4 | 3.7 | ν Oph | 1.2 | 2.1 | K0G2D0J3/compact |
| 2019-06-09 | 08:58:50 | 1.6 | 2.0 | β Sgr | 1.1 | 2.8 | K0G2D0J3/compact |
| 2019-06-25 | 01:02:23 | 0.6 | 2.8 | δ Sgr | 0.9 | 0.9 | A0B2D0C1/medium |
| 2019-06-25 | 02:41:26 | 1.1 | 0.7 | δ Sgr | 1.1 | 1.1 | A0B2D0C1/medium |
| 2019-06-25 | 03:38:24 | 1.0 | 0.8 | δ Sgr | 1.0 | 0.7 | A0B2D0C1/medium |
| 2019-06-25 | 04:33:20 | 1.0 | 0.8 | β Sgr/δ Sgr | 1.1/1.0 | 0.8/1.0 | A0B2D0C1/medium |
| 2019-06-25 | 06:12:47 | 1.1 | 1.0 | δ Sgr | 1.1 | 0.8 | A0B2D0C1/medium |
| 2019-06-25 | 07:04:58 | 1.2 | 0.8 | δ Sgr | 1.2 | 1.0 | A0B2D0C1/medium |
| 2019-06-26 | 00:42:32 | 1.6 | 0.8 | δ Sgr | 1.3 | 0.8 | A0B2D0C1/medium |
| 2019-08-29 | 00:16:25 | 0.5 | 3.3 | β Sgr/ν Oph/α Ser | 0.9/0.8/1.4 | 1.5/1.7/1.5 | A0G1J2J3/Large |
Notes. (a)UT time at the start of the data acquisition. (b)Seeing during the observation for the science target. (c)Coherence time in the visible spectral region of thescience target. (d)Calibrator stars used. Some parameters of the calibrators are reported in Table 2.
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