336 nm − 275 nm PHAT map (Dalcanton et al. 2012): the blue crosses correspond to the position of the so-called P1 and P2, the two maxima of this region (Bender et al. 2005). The black cross corresponds to our reference point, quoted by Crane et al. (1992) as the “optical nucleus” from de Vaucouleurs & Corwin (1985). The star refers to the radio nucleus detected by Crane et al. (1992): it is in good agreement with the P2 position. In the bottom left corner, we show the IRAM-PdB beam of our observations. The black contours correspond to our detection within the sphere of influence of the black hole (red circle): we summed the three main channels and display the contours above 450 mJy km s-1.
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