  A measurement of the top quark pair production cross section in the final
state with a hadronically decaying tau lepton and jets is presented. The
analysis is based on proton-proton collision data recorded by the ATLAS
experiment at the LHC, with a centre-of-mass energy of 7 TeV. The data sample
corresponds to an integrated luminosity of 1.67 inverse femtobarns. The cross
section is measured to be 194 +/- 18 (stat.) +/- 46 (syst.) pb and is in
agreement with other measurements and with the Standard Model prediction.
