Holmberg IX X-1 is an archetypal ultraluminous X-ray source (ULX). Here we study the properties of the optical counterpart and of its stellar environment using...
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PublicaciónOptical Properties of the Ultraluminous X-Ray Source Holmberg IX X-1 and Its Stellar Environment
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PublicaciónOptical studies of the X-ray transient XTE J2123-058 - I. Photometry
We present optical photometry of the X-ray transient XTE J2123-058, obtained in 1998 July-October. The light curves are strongly modulated on the 5.95-h orbital...
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PublicaciónOptical Study of the Hyper-luminous X-Ray Source 2XMM J011942.7+032421
We present the identification and characterization of the optical counterpart to 2XMM J011942.7+032421, one of the most luminous and distant ultra-luminous X...
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PublicaciónOverview of an extensive multi-wavelength study of GX 339-4 during the 2010 outburst
Context. The microquasar GX 339-4 experienced a new outburst in 2010: it was observed simultaneously at various wavelengths from radio up to soft γ-rays. We...
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PublicaciónOverview of an extensive multi-wavelength study of GX 339-4 during the 2010 outburst (Corrigendum)
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PublicaciónParallel tracks in infrared versus X-ray emission in black hole X-ray transient outbursts: a hysteresis effect?
We report the discovery of a new hysteresis effect in black hole X-ray binary state transitions, that of the near-infrared (NIR) flux (which most likely...
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PublicaciónPhase-dependent Study of Near-infrared Disk Emission Lines in LB-1
The mass, origin, and evolutionary stage of the binary system LB-1 have been intensely debated, following the claim that it hosts an ∼70M ☉ black hole, in stark...
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PublicaciónPhotoionization instability of the Fe K absorbing plasma in the neutron star transient AX J1745.6-2901
AX J1745.6-2901 is a low-mass X-ray binary with an accreting neutron star, showing clear evidence for highly ionized absorption. Strong ionized Fe Kα and Kβ...
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PublicaciónPolarized infrared emission from X-ray binary jets
Near-infrared (NIR) and optical polarimetric observations of a selection of X-ray binaries are presented. The targets were observed using the Very Large...