VLA images of NH₃ (1, 1) (top) and (2, 2) (bottom) emission from IRC +10420. In each panel, the LSR velocity is shown and the position of IRC +10420 is marked by a cross. The circular restoring beam with a FWHM of 3.″7 is indicated in the bottom-left corner of the first panel. The contour levels for the NH₃ lines are drawn at: 3, 4, 5, 6, 7, 8σ, where σ = 0.69 mJy beam−1 for (1, 1) andσ = 0.68 mJy beam−1 for (2, 2).