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Aims: To investigate structure of the hot object in the symbiotic prototype ZAnd during its major 2000-03 active phase. Methods: Analysis of the farultraviolet, optical low- and high-resolution spectroscopy and UBVR photometry.Reconstruction of the spectral energy distribution (SED) during the outburst.The Raman scattering process. Results: At the initial stages of the outburstthe hot object was characterized by the two-temperature spectrum (a warmstellar radiation and a strong nebular emission) with signatures of amass-outflow at moderate (100-200 km/s) and very high (1000-2000 km/s)velocities. The corresponding structure of the hot object consists of anoptically thick, slowly-expanding disk-like material encompassing the accretorat the orbital plane and a fast optically thin wind over the remainder of thestar. A striking similarity of [FeVII]6087 and Raman 6825 profiles at/after thedilution of the disk suggested their origin within the interaction zone wherethe winds from the binary components collide.Comment: 18 pages (printed format), 9 figures, 4 tables, 2 appendices;  accepted for publication in A&A (02/03/2006

Structure of the hot object in the symbiotic prototype Z Andromedae during its 2000–03 active phase