Greyscale shows the combined 5 GHz global array GC031A, B, C natural weighted image of the Western nucleus. The noise rms is 8 μJy/beam, the image size is 512  ×  256 mas. Labelled in white are the variable sources W7, W26 and W29. The green crosses give the 1.3 mm and 2.6 mm IRAM positions of the hot dust “AGN” feature from Downes & Eckart (2007), the green circle is the position from the 0.8 mm observation of Sakamoto et al. (2008). Errors on these positions are estimated to be of order 50 − 100 mas. The black ellipse gives the orientation and size of the hot dust feature as fitted by Downes & Eckart (2007) centred at the centroid (red square) of the three millimeter interferometer positions.