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Table 1.
Observation summary for the night of 2017-03-25.
| ID | texp. | Seeing | Airmass | Comment |
|---|---|---|---|---|
| (s) | FWHM(″) | |||
| Mrk 71 | 2 × 1800 | 1.7″ | 1.19 | H II region |
| sky | 300 | 1.7″ | 1.19 | Δα, Δδ = ( + 1′, − 1′) |
| G191B2B | 300 | 1.6″ | 1.12 | Standard star |
Notes. Field of view: 16″ × 16″; Wavelength range: 5825–7650 Å; Resolving power at 6500 Å: 
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