427 citations · 1.7k across the 40 of their papers we have counts for
7 papers · 2 filters
The host galaxies of long-duration GRBs in a cosmological hierarchical scenario
S. E. Nuza, P. B. Tissera, L. J. Pellizza +3
We developed a Monte Carlo code to generate long-duration gamma ray burst (LGRB) events within cosmological hydrodynamical simulations consistent with the concordance model. As str…
GRB 050223: A dark GRB in a dusty starburst galaxy
L. J. Pellizza, P. -A. Duc, E. Le Floc'h +19
Aims: We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods: We use VLT optical/NIR images coupled to Swift X-ray positioning, and o…
UVES/VLT high resolution spectroscopy of GRB 050730 afterglow: probing the features of the GRB environment
V. D'Elia, F. Fiore, E. Meurs +44
We analyze high resolution spectroscopic observations of the optical afterglow of GRB050730, obtained with UVES@VLT about hours after the GRB trigger. The spectrum shows that the I…
An enigmatic long-lasting gamma-ray burst not accompanied by a bright supernova
M. Della Valle, G. Chincarini, N. Panagia +14
Gamma-ray bursts (GRBs) are short, intense flashes of soft gamma-rays coming from the distant Universe. Long-duration GRBs (those lasting more than ~2 s) are believed to originate…
IGR J17544-2619: A new supergiant fast X-ray transient revealed by optical/infrared observations
L. J. Pellizza, S. Chaty, I. Negueruela
One of the most recent discoveries of the INTEGRAL observatory is the existence of a previously unknown population of X-ray sources in the inner arms of the Galaxy. IGR J17544-2619…
Analysis of the chemical evolution of the Galactic disk via dynamical simulations of the open cluster system
T. E. Tecce, L. J. Pellizza, A. E. Piatti
For several decades now, open clusters have been used to study the structure and chemical evolution of the disk of our Galaxy. Due to the fact that their ages and metallicities can…
Hypernova Signatures in the Late Rebrightening of GRB 050525A
M. Della Valle, D. Malesani, J. S. Bloom +22
We report observations of GRB 050525A, for which a Gemini North spectrum shows its redshift to be z = 0.606. This is the third closest long GRB discovered by Swift. We observed its…