Luigi Stella

TL;DR: In this article, the authors analyzed high resolution spectroscopic observations (R = 20000-45 000, corresponding to 14 km s −1 at at 4200 A and 66 km s -1 at 9000 A) of the optical afterglow of GRB050730, obtained with UVES @VLT ∼4 h after the GRB trigger.

TL;DR: In this article, the authors discovered a periodicity at about 8.7s from the X-ray sources 4U0142+61, previously considered a possible black hole candidate on the basis of its ultrasoft spectrum.

TL;DR: In this paper, a 2.8 s pulsation in the X-ray emission of the ULX source M51 ULX-7 was detected in the UNSEeN project, which was designed to hunt for pulsating ULXs with XMM-Newton.

TL;DR: In this paper, the authors consider the generation of the emission line recently discovered in the X-ray afterglow spectrum of several bursts and, especially, of GRB 991216 observed by Chandra.

TL;DR: In this paper, the authors carried out an in-depth spectral and timing analysis of these XMM-Newton data and provided strong convincing evidence that the supergiant fast X-ray transients were produced by the accretion of matter from a massive clump onto the compact object hosted in this system.