a): v_LSR distribution of the main (or only) line component of the NH₃(1, 1) lines with S/N> 3. Circles indicate the positions where a secondary component was found and their color corresponds to the velocity of this component. b): N(NH₃(1, 1)) distribution map calculated on positions where the τ optical depth from single HFS profile fit had an error of less than 50%. The grey area shows the total extension of the observed NH₃ map and the grey contours are the Herschel N(H₂): 0.7, 1.0, 1.3, 1.6, 2, 2.3, 2.6 × 10²² cm^-2 (from 20 to 80% of the maximum by 10%). The positions of TMC-1 CP, TMC-1(NH3), the SO peak, and IRAS 04381+2540 are indicated as before and the position of our NH₃ peak is indicated with an upside down triangle.