The matter within a few Schwarzschild radii of accreting neutron stars and black holes is moving under the influence of a strong gravitational field, and, in...
CharlaStrong gravity, dense matter -- probing compact objects
Publicación4U 1608-52 is back to quiescence after its 2007-2009 outburst
After an outburst that lasted more than 2.3 years (starting around June 12th., 2007; Palmer et al., ATel #1113), the neutron star transient and atoll source 4U...
PublicaciónA Decade of Accreting Millisecond X-Ray Pulsars
PublicaciónA Misfired Outburst in the Neutron Star X-Ray Binary Centaurus X-4
We report on a long-term optical monitoring of the neutron star X-ray binary Centaurus X-4 performed during the last 13.5 yr. This source has been in quiescence...
PublicaciónA second-order approximation to equatorial null geodesics in the Kerr metric - Application to light deflection in eclipsing compact binaries
We present a second-order analytical expansion of null equatorial geodesics in the Kerr metric. The equations developed are applied to the study of light...
PublicaciónA Swift/XRT observation of Aql X-1 during its recent outburst
We report on an observation performed with the Swift/XRT of the neutron-star X-ray transient Aql X-1 which was recently found to start a new outburst as...
PublicaciónA Tentative 114 minute Orbital Period Challenges the Ultracompact Nature of the X-Ray Binary 4U 1812-12
We present a detailed time-resolved photometric study of the ultracompact X-ray binary candidate 4U 1812-12. The multicolor light curves obtained with HiPERCAM...
PublicaciónA WSRT radio observation of IGR J00291+5934 in outburst
Following the recent reports of activity (ATels #1660, #1664, #1665, #1666) we observed the field of IGR J00291+5934 with the Westerbork Synthesis Radio...
PublicaciónAccreting millisecond pulsars: one on each hand
We report on the X-ray aperiodic timing analysis of two accreting millisecond pulsars: XTE J1807-294 and IGR J00291+5934. On the one hand, we discovered in XTE...