GCIRS34W: an irregular variable in the Galactic Centre S. Trippe, F. Martins, T. Ott, T. Paumard, R. Abuter, F. Eisenhauer, S. Gillessen, R. Genzel, A. Eckart and R. Schödel A&A, 448 1 (2006) 305-311 Published online: 17 February 2006 DOI: 10.1051/0004-6361:20053173