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Table 1
Observing log.
| Object | Start [UT] | End [UT] | Filter | On source [s] | PWV [mm] | Airmass | Seeing [′′] | Flux standard |
|---|---|---|---|---|---|---|---|---|
| HD 169414 | 03:35 | 03:46 | PAH-1 | 397 | 7.8 | 1.04 | 0.60 | PSF standard star |
| HD 179218 | 04:01 | 04:49 | PAH-1 | 1853 | 8.1 | 1.06 | 0.42 ± 0.03 | Science |
| HD 187642 | 05:37 | 05:48 | PAH-1 | 397 | 7.6 | 1.17 | 0.55 | PSF standard star |
| HD 169414 | 03:47 | 03:57 | PAH-2 | 417 | 7.7 | 1.06 | 0.51 | PSF standard star |
| HD 179218 | 04:51 | 05:33 | PAH-2 | 1807 | 8.1 | 1.14 | 0.45 ± 0.02 | Science |
| HD 187642 | 05:48 | 05:58 | PAH-2 | 417 | 7.0 | 1.20 | 0.58 | PSF standard star |
| HD 169414 | 20:55 | 21:06 | Si-6 | 397 | 8 | 1.03 | 1 | PSF standard star |
| HD 179218 | 21:40 | 22:28 | Si-6 | 1853 | 7.7 | 1.08 | 0.60 ± 0.03 | Science |
| HD 187642 | 22:34 | 22:44 | Si-6 | 397 | 8.2 | 1.11 | 0.5 | PSF standard star |
| HD 169414 | 00:38 | 00:49 | LR Spec. | 176 | 11.3 | 1.0 | 0.85 | Telluric standard |
| HD 179218 | 01:13 | 02:11 | LR Spec. | 943 | 11.1 | 1.02 | 0.77 | Science |
| HD 187642 | 02:32 | 02:43 | LR Spec. | 176 | 10 | 1.06 | 0.80 | Telluric standard |
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