Table 1: Journal of Fabry-Pérot observations.
Observations Telescope CFHT 3.6 m ESO 3.6 m
  Equipment MOS/FP @ Cassegrain CIGALE @ Cassegrain
  Date 2000, Feb. 28-Mar. 2 2002, April, 9
  Seeing 1''-1.2'' $\sim$1''
Calibration Comparison light $\lambda$ 6599 & 6717 Å $\lambda$ 6599 Å
Fabry-Pérot Interference order 1162 @ 6562.78 Å 796 @ 6562.78 Å
  Free spectral range at H$\alpha $ 265 km s-1 378 km s-1
  Finesse(1) at H$\alpha $ 14 12
  Spectral resolution at H$\alpha $ 13 672(2) 9375(2)
Sampling Sampling step 0.24 Å (10-11 km s-1) 0.35 Å (16 km s-1)
  Number of scanning steps 28 24
  Elementary observing time per interferogram 300 (s) 15 (s)
  Total field 352''$\Box$- 616$''\Box$ (2k px)2 (3) 207$''\Box$ (1k px)2
  Pixel size 0.88''(4) 0.405''(4)
Detector   Fast STIS 2 CCD GaAs/IPCS
(1) Mean Finesse through the field of view.
(2) For a signal to noise ratio of 5 at the sample step.
(3) Respectively for a raster 800 $\times$ 800 and 1400 $\times$ 1400.
(4) After binning 2 $\times$ 2.

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