Spitzer spectral map of the Serpens SE region in H₂ 0–0 S(5) line emission; color coded flux levels are indicated on the side bar. Dim stripes in the horizontal direction are residuals due to rogue pixel contamination of the IRS detectors. Yellow and white contours delineate high velocity blue- and red-shifted J = 3 − 2 CO gas from Dionatos et al. (2010b), showing a strong spatial correlation in the excitation between the two species. Positions of known protostellar sources from the catalog of Winston et al. (2007) are indicated on the map.