Table 1
Log of the SPHERE/IRDIS observations of WR104 and two PSF calibrators (4Sgr and TYC 6295-803-1).
| Star | MJD | Filtera | Seeing [″] | SR |
|---|---|---|---|---|
| WR104 | 57512.3 | CntH, FeII | 0.39 | 0.82 |
| 4Sgr | 57512.3 | CntH, FeII | 0.56 | 0.92 |
| WR104 | 57524.1 | IFS+(H2, H3, H4) | 1.13 | 0.73 |
| 4Sgr | 57524.1 | IFS+(H2, H3, H4) | 1.2 | 0.78 |
| WR104 | 57590.1 | HeI, CntJ, CntK2, CO | 0.45 | 0.87 |
| TYC 6295-803-1 | 57590.1 | CntJ, CntK2 | 0.44 | 0.87 |
Notes. SR is the estimated Strehl ratio performed by the AO system in the H band. The seeing measurements were taken by the 2016 Differential Image Motion Monitor of the ESO Paranal observatory.(a) Filters and their respective wavelengths: HeI: 1.085 ± 0:014 μm; continuum J: 1.213 0:017 m; continuum H: 1.554 0:023 m, FeII lines: 1.644 0:024 m; dual-band imaging (DBI) – H2H3 filter pair: 1.593 0:052 and 1.667 0:054 m, respectively, H3H4 filter pair: 1.667 0:054 and 1.733 0:057 m, respectively; CntK2 lines: 2.266 0:032 m; CO lines: 2.290 0:033 m.
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