With data collected during the first half of 2011 pp run of the Large Hadron
Collider at \surds = 7 TeV, a substantial data sample of high p_T triggers,
1.08/fb, has been collected by the ATLAS detector. Measurements of the
production of top-quark pairs and single top-quarks in different channels, the
top-quark mass, the top-quark pair charge asymmetry and spin correlations, and
the W helicity fractions in top-quark decays are presented, as well as two
searches for new physics effects involving top-quark pairs.Comment: Proceedings of the Lepton Photon 2011 Conference, to appear in
"Pramana - journal of physics". 4 pages, 12 figure
