2267 20160701171702.0 ASTROimport-424 Martayan, C. 2011 X-shooter, NACO, and AMBER observations of the LBV Pistol Star We present multi-instrument and multi-wavelength observations of the famous LBV star Pistol Star. These observations are part of a larger program on early O stars at different metallicities. The Pistol Star has been claimed to be one of the most massive star known, with 250 solar masses. We present preliminary results based on X-shooter spectra, as well as observations performed with the VLTI-AMBER and the VLT-NACO adaptive optics. The X-shooter spectrograph provides simultaneously a spectrum from the UV to the K-band with a resolving power of ˜15000. The preliminary results obtained indicate that Pistol Star has similar properties to η Car, including shells of matter, but is also a binary. Blomme, R. Le Bouquin, J.-B. Merand, A. Montagnier, G. Selman, F. Girard, J. Fox, A. Baade, D. Frémat, Y. Lobel, A. Martins, F. Patru, F. Rivinius, T. Sana, H. Stefl, S. Zorec, J. Semaan, T. Bulletin de la Societe Royale des Sciences de Liege 80 2011 400-404 http://esoads.eso.org/abs/2011BSRSL..80..400M published in REFERD