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Table 1
Observed radio-quiet quasars: properties, exposure times, and observing conditions.
| Quasar | zVC | zSDSS | uSDSS | gSDSS | texp [s] | Seeing [′′] | Airmass | Conditions | |||
|
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| Q0027+0103 | 2.310 | 2.313 | 19.27 | 18.50 | 7 × 1800s | 0.9–1.3 | 1.2–1.6 | photometric/grey | |||
| Q0308+0129 | 2.335 | – | 19.21 | 18.45 | 7 × 1800 | 1.0–1.4 | 1.2–1.5 | mainly clear/dark | |||
| Q0256−0003 | 2.381 | 2.385 | 20.13 | 19.41 | 8 × 1800+1 × 900 | 0.9–1.1 | 1.3–1.6 | photometric/dark | |||
| Q2243+0141 | 2.314 | – | 18.48 | 17.98 | 8 × 1800 | 0.9–1.2 | 1.3–1.5 | photometric/grey | |||
| UM 247 | 2.333 | 2.333 | 18.85 | 18.10 | 5 × 1800s | 0.9–1.1 | 1.2–1.4 | photometric/dark | |||
Notes. Redshifts from Véron-Cetty & Véron (2010; zVC); and Pâris et al. (2012; zSDSS). Photometry from Ahn et al. (2012).
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