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Table 1
Observing log.
| Slit | Stars | Date | Seeing [″] | Trans. | Moon | Airmass | Exposure time [s] |
|
|
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| slit_1 | OB121*, OB122 | 03-23-2012 | 1.2 | Clear + dust | Dark | 1.42 | 1698 |
| slit_2 | OB221, OB222* | 03-23-2012 | 1.1 | Clear + dust | Dark | 1.22 | 2498 |
| slit_3 | OB321, OB323*, OB324, OB326 | 03-23-2012 | 1.1 | Clear + dust | Dark | 1.21 | 2698 |
| slit_4 | OB421, OB422 | 03-25-2012 | 1.1 | Clear + dust | Dark | 1.28 | 2698 |
| slit_5 | OB521, OB523, OB524, OB525 | 03-25-2012 | 1.1 | Clear + dust | Dark | 1.40 | 2698 |
| slit_6 | OB621, OB622, OB623, OB625 | 03-26-2012 | 1.1 | Spectroscopic | Dark | 1.27 | 2698 |
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