Antonino Cucchiara

TL;DR: In this article, the photometric calibration of the Swift Ultraviolet/Optical Telescope (UVOT) was performed with observations of standard stars and standard star fields that represent a wide range of spectral star types.

TL;DR: Observations suggest a sudden accretion event onto a central MBH of mass about 106 to 107 solar masses, which leads to a natural analogy of Sw 1644+57 to a temporary smaller-scale blazar.

TL;DR: Multiwavelength observations of a unique γ-ray–selected transient detected by the Swift satellite, accompanied by bright emission across the electromagnetic spectrum, and whose properties are unlike any previously observed source are presented.

TL;DR: In this paper, the authors present multi-wavelength observations of three gamma-ray bursts (GRBs) with durations of several thousand seconds and demonstrate that these events are extragalactic transients; in particular, they resolve the long-standing conundrum of the distance of GRB 101225A (the "Christmas-day burst"), finding it to have a redshift z = 0.847 and showing that two apparently similar events (GRB 111209A and GRB 121027A) lie at z =0.677 and z = 1

TL;DR: In this article, the authors present the Swift observations of GRB 090515 and compare it to other gamma-ray bursts (GRBs) in the Swift sample, and suggest it might be energy injection from an unstable millisecond pulsar contributing to their emission.