On 2015 June 15, the Swift space observatory discovered that the Galactic black hole candidate V404 Cyg was undergoing another active X-ray phase, after 25...
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PublicaciónMASTER Optical Polarization Variability Detection in the Microquasar V404 Cyg/GS 2023+33
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PublicaciónMAXI J1659-152 is a BH candidate
We report on a pointed RXTE/PCA observation of the transient source MAXI J1659-152 (Atel #2873,#2874,#2875,#2877,#2880 GCN #11296,#11299, #11307 - initially...
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CharlaMeasuring Black Hole Spin
An astrophysical black hole is completely described with just two parameters: its mass and its dimensionless spin. A few dozen black holes have mass estimates...
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PublicaciónMulti-wavelength monitoring of GRS 1915+105
Since its discovery in 1992, the superluminal X-ray transient GRS 1915+105 has been extensively observed in an attempt to understand its behaviour. We present...
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PublicaciónMulticolour observations of V404 Cyg and J1118+480 with ULTRACAM
We present high time-resolution multicolour observations of the quiescent soft X-ray transients V404 Cyg and XTE J1118+480 obtained with ULTRACAM. The power...
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PublicaciónMultiwavelength observations of the black hole transient Swift J1745-26 during the outburst decay
We characterized the broad-band X-ray spectra of Swift J1745-26 during the decay of the 2013 outburst using INTEGRAL ISGRI, JEM-X and Swift XRT. The X-ray...
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PublicaciónMultiwavelength observations of XTE J1859+226
On March 2 06:00 UT the transient source XTE J1859+226 had faded considerably to R=18.0 in the optical (IAC) and to a flux of about 13 mCrab (RXTE ASM). However...
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PublicaciónNear-infrared emission lines trace the state-independent accretion disc wind of the black hole transient MAXI J1820+070
The black hole transient MAXI J1820+070 displayed optical P Cyg profiles and other wind-related emission line features during the hard state of its discovery...
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PublicaciónNew Optical Observations of XTE J1118+480
We report on new R-band photometry of the outbursting black hole candidate XTE J1118+480 (ATEL #383, #384) obtained with the 4.2m WHT at the Observatorio del...