continued. For C¹⁷O, CN, H¹³CN, HCN, and HCO⁺ the contour levels start from 3-σ rms in steps of 3-σ rms with 3-σ rms values of 0.05, 0.05, 0.04, 0.17, and 0.34 K km s⁻¹, respectively. For N₂H⁺, HN¹³C, HNCO, HC₃N, and HC¹⁸O⁺ the contour levels start from 6-σ rms in steps of 4-σ rms with 3-σ rms levels of 0.08, 0.08, 0.05, 0.12, and 0.02 K km s⁻¹, respectively. For CH₃CN and CH₃CCH the contour levels start from 9-σ rms in steps of 6-σ rms with 3-σ rms values of 0.01 and 0.03 K km s⁻¹, respectively.