The transient black hole candidate GX 339-4 is currently softening in X-ray, making a transition out of the hard state (ATel #2545). We are monitoring the...
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PublicationOptical/IR flux fading rapidly in GX 339-4: OIR jet quenching
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PublicationOrphan optical flare as SOSS emission afterglow, localization in time
We report on MASTER optical observations of an afterglow-like optical and X-ray transient AT2021lfa/ZTF21aayokph. We detected the initial steady brightening of...
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PublicationPhase-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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TalkProbing the early Universe with gravitational Wave Background
We will review both theoretical and obsevational aspects of gravitational wave backgrounds of cosmological origin. We will present a classifcation of...
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PublicationProperties of OB star-black hole systems derived from detailed binary evolution models
Context. The recent gravitational wave measurements have demonstrated the existence of stellar mass black hole binaries. It is essential for our understanding...
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PublicationQuiescent NIR and optical counterparts to candidate black hole X-ray binaries
We present near-infrared and optical imaging of 15 candidate black hole X-ray binaries. In addition to quiescent observations for all sources, we also observed...
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PublicationRadio activity in H1743-322
Following the detection of renewed activity in H1743-322 with Swift/BAT (Krimm et al., ATEL #2058), we triggered radio observations of the source using the VLA...
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NewsRAFFAELLA MORGANTI: "The first image of a black hole was an important milestone for astrophysics"
Radioastronomy is one of the branches of observational astrophysics which has experienced considerable growth in recent years. To study the universe at radio...
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PublicationRe-brightening of XMMSL1 J171900.4-353217
We continued our Swift-XRT monitoring of the new very-faint X-ray source XMMSL1 J171900.4-353217 [ATel #2607, #2656]. Two new observations were obtained on Jun...