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Fig. A.2

image

Comparison of our ALMA data with single-dish spectra of the brightest lines in the scan. The blue line shows the spectrum extracted from the ALMA visibilities by fitting a point source with the CASA routine uvmultifit. The black line shows single dish spectra observed by the authors with the IRAM 30 m telescope. The error bars show the squared sum of the rms of the two datasets. The spectra were interpolated to a common resolution of 28 and 19.5 MHz at 3 and 1 mm, respectively.

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