Pintore, FabioFabioPintoreZAMPIERI, LucaLucaZAMPIERIMEREGHETTI, SandroSandroMEREGHETTIWOLTER, Anna Luisa MariaAnna Luisa MariaWOLTERRODRIGUEZ CASTILLO, Guillermo AndresGuillermo AndresRODRIGUEZ CASTILLOISRAEL, Gian LucaGian LucaISRAELEsposito, P.P.EspositoPAIANO, SimonaSimonaPAIANOTRINCHIERI, GinevraGinevraTRINCHIERIOchner, P.P.Ochner2020-10-122020-10-1220180035-8711http://hdl.handle.net/20.500.12386/27739NGC 925 ULX-1 and ULX-2 are two ultraluminous X-ray sources (ULXs) in the galaxy NGC 925, at a distance of 8.5 Mpc. For the first time, we analysed high quality, simultaneous XMM-Newton and NuSTAR data of both sources. Although at a first glance ULX-1 resembles an intermediate mass black hole candidate (IMBH) because of its high X-ray luminosity [(2-4) × 10<SUP>40</SUP> erg s<SUP>-1</SUP>] and its spectral/temporal features, a closer inspection shows that its properties are more similar to those of a typical super-Eddington accreting stellar black hole and we classify it as a `broadened disc' ULX. Based on the physical interpretation of this spectral state, we suggest that ULX-1 is seen at small inclination angles, possibly through the evacuated cone of a powerful wind originating in the accretion disc. The spectral classification of ULX-2 is less certain, but we disfavour an IMBH accreting at sub-Eddington rates as none of its spectral/temporal properties can be associated with either the soft or the hard state of Galactic accreting black hole binaries.STAMPAenArticle10.1093/mnras/sty17662-s2.0-85051556994000441382300103https://academic.oup.com/mnras/article/479/3/4271/50490282018MNRAS.479.4271PFIS/05 - ASTRONOMIA E ASTROFISICA