Fig. 2.

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13CO emission towards the vicinity of J2108. Left: 13CO moment-0 map, integrated between −22 and 14 km s−1, presented in a colour scale. The temperature scale has been corrected for main-beam efficiency. The Fermi-LAT TS map from Fig. 1 is overlaid with contours [10, 15, 30, 40, 50, 60, 70, 80, 90] in percentage of the maximum excess value. Right: spectrum of 13CO (J = 1 → 0) emission extracted from the area outlined by the dashed ellipse in the left panel, which covers the Fermi-LAT gamma-ray region of excess. Three spectral components are identified: C1, C2 and C3 centred at ∼−13, −3, and +9 km s−1 respectively.
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