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Low-resolution VLT spectroscopy of GRBs 991216, 011211 and 021211
P. M. Vreeswijk, A. Smette, A. S. Fruchter +16
We present low-resolution VLT spectroscopy of the afterglow of the gamma-ray bursts (GRBs) 991216, 011211 and 021211. Our spectrum of GRB991216 is the only optical spectrum for thi…
Clearing up the clouds around NGC 4151: evidence of a highly ionized absorber
L. Piro, A. De Rosa, G. Matt +1
The Seyfert 1 galaxy NGC4151 is characterized by complex X-ray absorption, well described by a dual absorber, composed of a uniform mildly ionized gas and a cold system that partia…
The BeppoSAX catalog of GRB X-ray afterglow observations
M. De Pasquale, L. Piro, B. Gendre +8
We present the X-ray afterglow catalog of BeppoSAX from the launch of the satellite to the end of the mission. Thirty-three X-ray afterglows were securely identified based on their…
A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy
D. Q. Lamb, G. R. Ricker, D. Lazzati +26
[Abridged] Very recently, relations between the peak energy of Gamma-Ray Burst burst spectra, the isotropic-equivalent energy of the burst, and the radiated energy of the burst hav…
ESTREMO: Extreme phySics in the TRansient and Evolving COsmos
Enrico Costa, Luigi Piro
We present a mission designed for the study of transient phenomena in the high energy sky, through a wide field X-ray/hard X-ray monitor, and fast (< 1 min) follow up observations…
Global properties of X-ray afterglows of GRB
Luigi Piro
In this paper we review the general properties of X-ray afterglows. We discuss in particular on the powerful diagnostics provided by X-ray afterglows in constraining the environmen…