Fig. 8
Portion of the UVES spectrum of J 1237 + 0647 covering the (1–0) Lyman band of H2. The labels indicate the branches (“R”, “P” for ΔJ = − 1, + 1, respectively) and the rotational levels of the lower states. Absorptions from different components are indicated by different label colours (#1: blue, #2: green, #3: red).
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