Table 1: Observing log.
Group name Exp. time $\langle$seeing$\rangle$ FLIa $\langle$X $\rangle^{b}$ Sky transparencyc
  (s)        
PCG 100355+190454 2 $\times$ 900 (A,D); 2 x 720 (B,C) 0.9 $\hbox{$^{\prime\prime}$ }$ 100 1.5 CLR/THN
PCG 101345+194541 2 $\times$ 900 (A,B,C,D) 0.8 $\hbox{$^{\prime\prime}$ }$ 30 1.6 CLR/THN
PCG 103349+225324 2 $\times$ 900 (A,D); 2 x 720 (B,C) 0.9 $\hbox{$^{\prime\prime}$ }$ 100 1.9 CLR/THN
PCG 103959+274947 2 $\times$ 720 (A,B); 2 x 900 (C,D) 1.0 $\hbox{$^{\prime\prime}$ }$ 80 1.9 CLR
PCG 104338+281711 2 $\times$ 720 (A,B); 2 x 900 (C,D) 1.2 $\hbox{$^{\prime\prime}$ }$ 40 1.7 THN
PCG 104538+175826 2 $\times$ 720 (A,B); 2 x 900 (C,D) 1.0 $\hbox{$^{\prime\prime}$ }$ 90 1.5 CLR/THN
PCG 110941+203320 2 $\times$ 900 (A,B,C,D) 1.2 $\hbox{$^{\prime\prime}$ }$ 90 1.6 CLR/THN
PCG 114233+140738 2 $\times$ 900 (A,B,C,D) 0.9 $\hbox{$^{\prime\prime}$ }$ 20 1.5 CLR/THN
PCG 114333+215356 2 $\times$ 900 (A,B,C,D) 1.0 $\hbox{$^{\prime\prime}$ }$ 100 1.6 CLR/THN
PCG 121157+134421 2 $\times$ 900 (A,B,C,D) 1.2 $\hbox{$^{\prime\prime}$ }$ 60 1.6 THN
PCG 121252+223519 2 $\times$ 900 (A,B,C,D) 0.8 $\hbox{$^{\prime\prime}$ }$ 100 1.7 CLR/THN
PCG 121516+153357 2 $\times$ 720 (A,B,C,D) 1.0 $\hbox{$^{\prime\prime}$ }$ 30 1.4 CLR/THN
PCG 130157+191511 1 $\times$ 720 (A,B,C,D) 0.9 $\hbox{$^{\prime\prime}$ }$ 70 1.5 CLR
PCG 130926+155358 2 $\times$ 900 (A,B,C,D) 0.7 $\hbox{$^{\prime\prime}$ }$ 80 1.8 CLR
PCG 145239+275905 2 $\times$ 720 (A,B); 2 x 1200 (C,D) 0.7 $\hbox{$^{\prime\prime}$ }$ 90 1.9 CLR
PCG 154930+275637 2 $\times$ 900 (A,B,C,D) 1.2 $\hbox{$^{\prime\prime}$ }$ 60 1.9 THN
PCG 161754+275834 2 $\times$ 900 (A,B,C,D) 0.7 $\hbox{$^{\prime\prime}$ }$ 90 1.8 CLR
PCG 170458+281834 2 $\times$ 900 (A,B,C,D) 1.0 $\hbox{$^{\prime\prime}$ }$ 50 1.9 CLR/THN
a FLI = fraction of illuminated moon.
b Average airmass of the group.
c CLR = clear; THN = thin cirrus.

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