NOEMA spectrum of the WideX 3.6 GHz bandwidth (at ~1.95 MHz (~ 6.6km s-1) channel spacing) extracted from the naturally weighted data cube. The position of the HCO+, HCN and C2H 1−0 lines are indicated in color. We note that due to hyperfine splitting, C2H 1−0 shows two emission line components.
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