Erratum: It is is said in the abstract and in the conclusions that the thickness of the bar is 1.2 kpc at l=20 deg. and somewhat lower for higher longitudes; however, as correctly stated in the text of that article, this number is the sigma of a Gaussian distribution, equivalent to a dispersion of sigma=~0.5 mag in the red clump distribution along the line of sight. Therefore, the axial ratios for the long bar are approximately 1:0.25:0.03.
Author comment submitted on 2 June, 2011 by Martín López-Corredoira ( martinlc@iac.es )