Hα image of NGC 6334 (Galactic coordinates are indicated on the figure). The image was obtained by adding λ maps over the full spectral range, flat-fielding, and then correcting for distortion. This is equivalent to a photograph obtained through a filter with a 10 Å bandwidth. The central and most intense field is surrounded by a white square, while the other fields are labelled from F1 to F5. The numbers indicated on the image give the velocities of the three components that were fitted to the profile (ranked by decreasing intensity order) at this (central) position. When the number is followed by an asterisk or a hat symbol, this means that the fitted Gaussian has a FWHM that is significantly larger or thinner than 25 km s^-1, respectively.