Luigi Stella

TL;DR: In this paper, the absorption feature detected in the prompt X-ray emission of GRB 990705 bears important consequences, and the authors conclude that the absorbing material cannot be very close to the burster and is likely to be moderately clumped.

TL;DR: The iron Kα line at ~6.5 keV is found to be intrinsically broad (FWHM ~ 1.2 keV); its width can be explained by reflection from a cold accretion disk extending down to ~15 km from the neutron star center or by Compton broadening in the external parts of a hot Comptonizing corona.

TL;DR: In this paper, the first Suzaku observation of the new Soft Gamma Repeater (SGR 0501+4516) was performed on 2008 August 26, four days after the onset of bursting activity of this new member of the magnetar family.

TL;DR: In this article, the results of a Chandra 30 ks observation of the low mass X-ray binary and atoll source 4U 1705-44 were presented, where three narrow emission lines at 1.47, 2.0, and 2.6 keV were identified with Ly-alpha emission from Mg XII and S XVI, respectively.

TL;DR: In this article, the authors reanalyse the Chandra spectra of Aql X-1, together with a long BeppoSAX observation in the same period, and propose a different interpretation of the spectral variability: that this is due to correlated variations of the power law component and the column density (>5, a part of which might be intrinsic to the source), while the temperature and flux of the neutron star atmospheric component remained unchanged.