Molecular absorption bands of H2 for sightlines A (top two panels) and B (bottom panel) from the Keck/HIRES spectra. The locations of the rotational J level for each of the vibrational bands are shown in blue above the spectra. The best-fit absorption profiles are shown in red. The data have been rebinned and smoothed (using Gaussian smoothing with an FWHM of 1.5 pixels) for visual clarity.
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