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...
Radio Continuum Studies of Ultracompact and Short Orbital Period X-Ray Binaries
We present the radio continuum counterparts to the enigmatic ultracompact X-ray binaries (UCXBs): a black hole or neutron star accreting from a hydrogen...
RAFFAELLA MORGANTI: “La primera imagen de un agujero negro ha sido un hito muy importante para la Astrofísica"
La Radioastronomía es una de las ramas de la Astrofísica observacional que ha experimentado un mayor crecimiento en los últimos años. Para estudiar el Universo...
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...
Recent Chandra and Swift Observations of New X-ray Transients in M31
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...
Renewed 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...
Revisiting the fundamental parameters for the black hole X-ray transient Swift J1753.5–0127
We present time-resolved Gran Telescopio Canarias optical spectroscopy and William Herschel Telescope i-band photometry of the X-ray transient SWIFT J1753.5...
Rol de la transferencia de masa en binarias de objetos compactos
Understanding the properties, formation, and evolutionary path of high- mass star systems is a fundamental research topic in stellar astrophysics. Under certain...
Rotating ``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...