Table 1.
Summary of spectroscopic observations.
| Instrument | Date | Spectral range | Slit/fibre | Seeing | R = λ/Δλ | Nexp | texp | Δt |
|---|---|---|---|---|---|---|---|---|
| (Å) | (arcsec) | (arcsec) | (s) | (h) | ||||
| UVES | 2002 Jun. 4 | 3282 − 4563 | 0.44 | 1.73 | 49 620 | 1 | 2700 | 0.75 |
| 4583 − 6687 | 0.3 | 1.73 | 51 690 | 1 | 2700 | 0.75 | ||
| 2012 Mar. 5 | 3281 − 4562 | 0.8 | 0.82 | 68 642 | 1 | 120 | 0.03 | |
| 4583 − 6686 | 0.8 | 0.82 | 107 200 | 1 | 120 | 0.03 | ||
| X-shooter | 2014 Oct. 20 | 2989 − 5560 | 1.3, 5.0 | 0.92, 0.94 | 2000, 1900 | 2 | 20 | 0.01 |
| 5337 − 10 200 | 1.2, 5.0 | 0.88, 0.95 | 3300, 3200 | 2 | 20 | 0.01 | ||
| 9940 − 24 790 | 1.2, 5.0 | 0.88, 0.95 | 3900, 2600 | 2 | 20 | 0.01 | ||
| HARPS | 2017 Jan. 11 | 3800–6900 | 1 | 0.73 − 1.33 | 163 000 | 55 | 300 | 4.97 |
| 2019 Feb. 20 | 3800–6900 | 1 | 0.74 − 2.2 | 158 000 | 53 | 300 | 4.87 | |
| 2019 Feb. 21 | 3800–6900 | 1 | 0.4 − 0.88 | 156 000 | 51 | 300 | 4.60 | |
| HST | 2017 Feb. 11 | 1660 − 3070 | 0.5 | 910 | 3 | 105 | 0.15 | |
| 2890 − 5700 | 0.5 | 800 | 3 | 30 | 0.09 | |||
| 5260 − 10 250 | 0.5 | 790 | 1 | 60 | 0.05 | |||
| IUE | 1982 Nov. 17 | 1150 − 1950 | 300 | 3 | 119 − 10 800 | 3.07 | ||
| 1900 − 3200 | 300 | 3 | 70 − 9000 | 2.54 | ||||
| 1983 Apr. 19 | 1150 − 1950 | 300 | 6 | 90 − 239 | 0.27 | |||
| 1900 − 3200 | 300 | 4 | 60 − 180 | 0.12 | ||||
| 1984 Feb. 25 | 1150 − 1950 | 300 | 5 | 119 − 3000 | 1.00 | |||
| 1900 − 3200 | 300 | 1 | 180 | 0.05 | ||||
| 1985 Mar. 14 | 1150 − 1950 | 300 | 3 | 2160, 3600 | 2.60 | |||
| 1900 − 3200 | 300 | 2 | 1380 | 0.77 | ||||
| 1985 Jun. 3 | 1150 − 1950 | 300 | 1 | 90 | 0.02 | |||
| 1900 − 3200 | 300 | 2 | 90, 390 | 0.13 | ||||
| 1986 Nov. 6–7 | 1150 − 1950 | 300 | 12 | 119 − 3600 | 6.25 | |||
| 1900 − 3200 | 300 | 7 | 60 − 119 | 0.16 | ||||
| 1991 Nov. 2–3 | 1150 − 1950 | 300 | 15 | 80 − 119 | 0.41 | |||
Notes.
The total time of observations Δt was determined as the time elapsed between the start of the first exposure and the end of the last exposure from the corresponding run. This approach was chosen to better describe the phase coverage of the time-resolved spectroscopy. In the case of the IUE data, which were not always obtained consecutively, Δt was determined as the sum of exposure times of all spectra in corresponding runs. The Slit/fibre column lists the width of the slits or the diameter of the fibres; Nexp is the number of exposures.
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