Example of isolated CH₃OCHO transitions observed within 0.8″ (in black). The best-fit model is superposed in red, and the corresponding spectroscopic parameters are listed in Table A.1. The corresponding V_LSR for the three components are −1.9, 3.0, and 9.2 km s⁻¹, and for the FWHM, they are 2, 5, 4 km s⁻¹, respectively. The grey shaded area corresponds to the filled histogram above and below the baseline.