Mid-infrared interferometry of 23 AGN tori: On the significance of polar-elongated emission N. López-Gonzaga, L. Burtscher, K. R. W. Tristram, K. Meisenheimer and M. Schartmann A&A, 591 (2016) A47 Published online: 09 June 2016 DOI: 10.1051/0004-6361/201527590