Fig. 6
H2CO rotational diagrams of the sources in the CrA survey where at least two H2CO lines were detected. The ortho lines are filled in the left half and the para lines are filled in the right half. Red square data points are 1.3 mm lines and blue circle data points are 0.8 mm lines, all observed with APEX. (A colour version of this plot is available in the online Journal.)
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