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Fig. 9


Upper panel: comparison of the data (dots for July 26, diamonds for August 13) with spectral models (solid black line for July 26, dotted black line for August 13), showing the increased C2H6 emission on July 26. The data are an average over the 4.1′′-long slit for the cross-dispersed echelle mode of VLT/VISIR. Lower panel: residual between the data and the model for July 26 (solid black line) and August 13 (dotted black line). Models were calculated for the C2H6-only case, fixing T(p) to the August 13 values. Note that the vertical scales for a) and b) differ from one another.

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