Image Details
 
                    Caption: Figure 5.
Hα cluster members confirmed with spectroscopy with two independent observations from different telescopes. The redshifts and emission-line properties are in excellent agreement, despite the different telescope sizes (4, 6.5, 8, and 10 m), exposure times (0.5–2 hr), observing conditions (dark time vs. gray time with thin clouds), and instrument properties (1″slits vs. 1.5″ fibers, 1−12.5 Å spectral resolution). For display purposes, we subtracted the median and normalized the data to the maximum value in each panel.
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