Table 2
Observation log of the new SPHERE, SOAR, and GRAVITY observations.
| UT-Date | MJD | Telescope | Instr. | Filter | Mode | Nb Exp. | Nb Integration | Exp. Time (s) | ω (″) | τ0 (ms) |
|---|---|---|---|---|---|---|---|---|---|---|
| 27-09-2000 | 51826.186 | SOAR | HRCAM | I | SI | 3 | 400 | 0.024 | ||
| 27-09-2002 | 52459.690 | SOAR | HRCAM | I | SI | 3 | 400 | 0.024 | ||
| 05-06-2015 | 57178.378 | VLT/UT3 | IRDIS | K1 | DBI | 21 | 35 | 2 | 1.75 | 1.2 |
| 27-09-2015 | 57291.493 | SOAR | HRCAM | I | SI | 3 | 400 | 0.024 | ||
| 30-09-2017 | 58026.077 | VLT/UT3 | IRDIS | K1 | DBI | 2 | 30 | 2 | 0.72 | 3.4 |
| 27-05-2018 | 58265.219 | SOAR | HRCAM | I | SI | 2 | 400 | 0.024 | ||
| 16-07-2019 | 58680.881 | SOAR | HRCAM | I | SI | 2 | 400 | 0.024 | ||
| 15-08-2019 | 58710.188 | VLTI/UTs | GRAVITY | K | MED | 3 | 20 | 10 | 0.95 | 2.9 |
| 29-05-2021 | 59363.331 | VLTI/UTs | GRAVITY | K | MED | 3 | 12 | 30 | 0.64 | 5.0 |
| 24-08-2021 | 59450.195 | VLTI/UTs | GRAVITY | K | MED | 3 | 12 | 30 | 0.90 | 2.6 |
| 02-10-2021 | 59489.151 | SOAR | HRCAM | I | SI | 3 | 400 | 0.024 | ||
| 20-10-2021 | 59507.082 | VLTI/UTs | GRAVITY | K | MED | 3 | 12 | 30 | 1.00 | 2.8 |
Notes. The exposure time is given by Nexp, the number of exposures, multiplied by NDIT and DIT, which are the number and duration of integrations per exposure (in the case of HRCAM in ms). ω and τ0 are the seeing and the coherence time respectively. For the modes, DBI refers to Dual-Band Imaging, SI to Speckle Interferometry and MED for medium spectral resolution interferometry.
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