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Table 1:

X-shooter observations of the 8 o'clock arc.
  Observing date Arm Resolution Exposure time Slit positiona
      $R=\lambda/\Delta \lambda$ (s)  
#1 Nov. 16, 2008 UV-B 4000 3600 ${\rm PA} = 118^{\circ}$along A2 and A3
#2 Nov. 16, 2008 VIS-R 6700 3600 Same as #1
#3 Nov. 16, 2008 UV-B 4000 3600 ${\rm PA} = 118^{\circ}$along A2 and A3
#4 Nov. 16, 2008 VIS-R 6700 3600 Same as #3
#5 Nov. 18, 2008 UV-B 4000 4500 ${\rm PA} = 121^{\circ}$along A2 and A3
#6 Nov. 18, 2008 VIS-R 6700 4500 Same as #5
#7 Nov. 19, 2008 UV-B 4000 4500 ${\rm PA} = 13^{\circ}$along A2 and the LRG
#8 Nov. 19, 2008 VIS-R 6700 4500 Same as #7

Notes. (a) Labels of the lens images as in Allam et al. (2007) and Fig. 1.


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