Table 1
Summary of the ESPRESSO observations.
| # | Calendar | UT obs. | Texp | Nobs (in/out) | Airmass (a) | S∕N (b) | Telescope | PID (c) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| night | window | [s] | Continuum (d) | Na core | Hα core | |||||
| 1 | 2018-10-31 | 00:51–04:37 | 500 | 24 (13/11) | 1.21–1.20–1.98 | 34–46 | 2–7 | 13–19 | VLT-UT3 | i |
| 2 | 2018-11-07 | 00:05–04:24 | 800 | 18 (9/9) | 1.22–1.20–2.17 | 38–57 | 3–10 | 15–24 | VLT-UT3 | ii |
| 3 | 2018-11-14 | 00:23–04:13 | 800 | 16 (8/8) | 1.20–1.20–2.46 | 37–61 | 4–10 | 15–26 | VLT-UT2 | ii |
Notes. (a) First and third values refer to the airmass at the beginning and at the end of the observation. The second value gives the minimum airmass. (b) The two figures correspond to the minimum and maximum S/N, respectively. (c) PID i and ii refer to ESO programs 0102.D-0789 (PI: H. Cegla) and 0102.C-0493 (PI: G. Chen), respectively. (d) The signal-to-noise ratio (S/N) of the continuum was measured at around 590 nm.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.