We report recent observations of M31 taken with Chandra/ACIS-I on 2009-05-29.1 UT and with Swift/XRT on 2009-06-07.08 UT. In the 4ks Chandra/ACIS-I image, we...
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PublicationRecent Chandra and Swift Observations of New X-ray Transients in M31
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PublicationRenewed activity of the very faint X-ray transient CXOGC J174535.5-290124 and continued activity of the neutron-star X-ray transient SAX J1747.0-2853
On 8-9 September 2006, a series of 7 XMM-Newton observations were performed as part of our XMM-Newton/Chandra monitoring campaign of the 1.7 square degree...
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PublicationRotating ``black holes'' with holes in the horizon
Kerr-Schild solutions of the Einstein-Maxwell field equations, containing semi-infinite axial singular lines, are investigated. It is shown that axial...
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PublicationRXTE detects X-ray bursts from Circinus X-1
After the recent report of X-ray re-brightening (ATel #2608), RXTE has observed the peculiar neutron star X-ray binary Cir X-1 eleven times during the last two...
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PublicationSearch for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at √{ s} = 13TeV
A search for new physics in energetic, high-multiplicity final states has been performed using proton-proton collision data collected with the CMS detector at a...
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PublicationSearch for very high-energy gamma-ray emission from the microquasar Cygnus X-1 with the MAGIC telescopes
The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black hole transient. During the latter, Cygnus X-1 shows a one-sided...
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NewsSimilar states of activity identified in supermassive and stellar mass black holes
The researchers Juan A. Fernández-Ontiveros, of the Istituto Nazionale di Astrofisica (INAF) in Rome and Teo Muñoz-Darias, of the Instituto de Astrofísica de...
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PublicationSimultaneous INTEGRAL, RXTE, Swift and FT South observations of the transition of GX 339-4
As GX 339-4 has started to leave the Low/Hard State (ATel #2545), we triggered the 2nd part of our INTEGRAL campaign on GX 339-4 in the declining phase of the...
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PublicationSimultaneous X-ray and optical spectroscopy of V404 Cygni supports the multi-phase nature of X-ray binary accretion disc winds
Observational signatures of accretion disc winds have been found in a significant number of low-mass X-ray binaries at either X-ray or optical wavelengths. The...