MORETTI, AlbertoAlbertoMORETTIPARESCHI, GiovanniGiovanniPARESCHIBASSO, StefanoStefanoBASSOSPIGA, DanieleDanieleSPIGAGHIGO, MauroMauroGHIGOTAGLIAFERRI, GianpieroGianpieroTAGLIAFERRISIRONI, GiorgiaGiorgiaSIRONICIVITANI, Marta MariaMarta MariaCIVITANICOTRONEO, VincenzoVincenzoCOTRONEOLA PALOMBARA, NICOLANICOLALA PALOMBARAUSLENGHI, Michela Clelia AngelaMichela Clelia AngelaUSLENGHITordi, M.M.TordiDelorenzi, S.S.DelorenziValsecchi, G.G.ValsecchiZocchi, F.F.ZocchiMarioni, F.F.MarioniVernani, D.D.VernaniAmisano, F.F.AmisanoParissenti, G.G.ParissentiParodi, G.G.ParodiOttolini, M.M.OttoliniCorradi, P.P.CorradiBavdaz, M.M.BavdazFerreira, I.I.Ferreira2025-03-112025-03-11202197815106448230277-786Xhttp://hdl.handle.net/20.500.12386/36664The ATHENA X-ray telescope will be the largest X-ray optics ever built. The ground calibration of this mirror assembly raises significant difficulties due to its unprecedented size, mass and focal length. The VERT-X project aims at developing an innovative calibration system which will be able to accomplish to this extremely challenging task.The design is based on an X-ray parallel beam produced by an X-ray source positioned in the focus of a highly performing X-ray collimator; the beam will be accurately moved by a raster-scan mechanism covering all the ATHENA optics at different off-axis angles. The main driving factor in the VERT-X design is the ATHENA calibration requirement on the accuracy in the HEW measure which is 0.1", all over the field of view. The VERT-X project, started in January 2019, is financed by ESA and conducted by a consortium that includes INAF together with EIE, Media Lario, BCV Progetti and GPAP.STAMPAenConference paper10.1117/12.25936702-s2.0-85117766401https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11822/2593670/The-VERT-X-calibration-facility--development-of-the-most/10.1117/12.2593670.shorthttps://api.elsevier.com/content/abstract/scopus_id/851177664012021SPIE11822E..0KMFIS/05 - ASTRONOMIA E ASTROFISICA