998 citations · 9.6k across the 157 of their papers we have counts for
81 papers · 1 filter
A new measurement of the cosmic X-ray background
A. Moretti, C. Pagani, G. Cusumano +14
We present a new measurement of the cosmic X-ray background (CXRB) in the 1.5-7 keV energy band, performed by exploiting the Swift X-ray telescope (XRT) data archive. We also prese…
Modelling the spectral response of the Swift-XRT CCD camera: Experience learnt from in-flight calibration
O. Godet, A. P. Beardmore, A. F. Abbey +11
(Abbreviated) We show that the XRT spectral response calibration was complicated by various energy offsets in photon counting (PC) and windowed timing (WT) modes related to the way…
Swift monitoring of Supergiant Fast X-ray Transients: the out-of-outburst behaviour and the flares from IGRJ17544-2916 and XTEJ1739-302
L. Sidoli, P. Romano, G. Cusumano +10
Supergiant Fast X-ray Transients (SFXTs) are a sub-class of High Mass X-ray Binaries (HMXBs) associated with OB supergiant companions and displaying transient X-ray activity. This…
Monitoring Supergiant Fast X-ray Transients with Swift. III. Outbursts of the prototypical SFXTs IGR J17544-2619 and XTE J1739-302
L. Sidoli, P. Romano, V. Mangano +7
IGR J17544-2619 and XTE J1739-302 are considered the prototypical sources of the new class of High Mass X-ray Binaries, the Supergiant Fast X-ray Transients (SFXTs).These sources w…
Scaler Mode Technique for the ARGO-YBJ Detector
G. Aielli et al.
The ARGO-YBJ experiment has been designed to study the Extensive Air Showers with an energy threshold lower than that of the existing arrays by exploiting the high altitude locatio…
Outliers from the mainstream: how a massive star can produce a gamma-ray burst
S. Campana, N. Panagia, D. Lazzati +12
It is now recognized that long-duration Gamma-Ray Bursts (GRBs) are linked to the collapse of massive stars, based on the association between (low-redshift) GRBs and (type Ic) core…
Science with the new generation high energy gamma- ray experiments
M. Alvarez, D. D'Armiento, G. Agnetta +197
This Conference is the fifth of a series of Workshops on High Energy Gamma- ray Experiments, following the Conferences held in Perugia 2003, Bari 2004, Cividale del Friuli 2005, El…
Different progenitors of short hard gamma-ray bursts
Eleonora Troja, Andrew R. King, Paul T. O'Brien +2
We consider the spatial offsets of short hard gamma-ray bursts (SHBs) from their host galaxies. We show that all SHBs with extended duration soft emission components lie very close…
A study of the prompt and afterglow emission of the Short GRB 061201
G. Stratta, P. D'Avanzo, S. Piranomonte +30
Our knowledge of the intrinsic properties of short duration Gamma-Ray Bursts has relied, so far, only upon a few cases for which the estimate of the distance and an extended, multi…
GAW - An Imaging Atmospheric Cherenkov Telescope with Large Field of View
G. Cusumano, G. Agnetta, A. Alberdi +47
GAW, acronym for Gamma Air Watch, is a Research and Development experiment in the TeV range, whose main goal is to explore the feasibility of large field of view Imaging Atmospheri…
Gamma Air Watch (GAW): the electronics and trigger concept
P. Assis, G. Agnetta, P. Brogueira +9
GAW proposes a new approach for the detection and measurement of the Cherenkov light produced by GeV/TeV gamma rays traversing the Earth atmosphere which imposes specific requireme…
Expected performance of the GAW Cherenkov Telescopes Array. Simulation and Analysis
M. C. Maccarone, P. Assis, O. Catalano +8
GAW is a "path-finder" experiment to test the feasibility of a new generation of Imaging Atmospheric Cherenkov telescopes that join high flux sensitivity with large field of view c…
Testing the gamma-ray burst variability/peak luminosity correlation on a Swift homogeneous sample
D. Rizzuto, C. Guidorzi, P. Romano +10
We test the gamma-ray burst correlation between temporal variability and peak luminosity of the -ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift dete…
The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Temporal Properties and Morphology
G. Chincarini, A. Moretti, P. Romano +24
We present the first systematic investigation of the morphological and timing properties of flares in GRBs observed by Swift/XRT. We consider a large sample drawn from all GRBs det…
Rest frame light curves of Swift GRBs
V. Mangano, V. La Parola, E. Troja +12
We have computed the luminosity rest frame light curves of the first 40 Gamma-ray bursts (GRBs) detected by Swift with well established redshift. We studied average properties of t…
Pile-up correction for the Swift-XRT observations in WT mode
T. Mineo, P. Romano, V. Mangano +12
The detector at the focal plane of the Swift X-ray Telescope (XRT) supports four readout modes, automatically changed on board, to cover the dynamical range of fluxes and rapid var…
In-flight calibration of the SWIFT XRT
G. Cusumano
The calibration of the Swift XRT effective area has been performed by analyzing cosmic sources observed during the in-flight calibration phase and by using laboratory results and r…
Swift GRBs: the early afterglow spectral energy distribution
G. Tagliaferri, D. Malesani, S. D. Vergani +16
We present the first results of a program to systematically study the optical-to-X-ray spectral energy distribution (SED) of Swift GRB afterglows with known redshift. The goal is t…
A multicomponent model for the optical to gamma-ray emission from the Crabpulsar
R. Campana, E. Massaro, G. Cusumano +1
We present a multicomponent model to explain the features of the pulsed emission and spectrum of the Crab Pulsar, on the basis of X and gamma-ray observations performed with BeppoS…
X-ray broad-band study of the symbiotic X-ray binary 4U 1954+31
N. Masetti, E. Rigon, E. Maiorano +5
(Abridged) We present results of several X-ray observations of the X-ray binary 4U 1954+31 performed with the satellites BeppoSAX, EXOSAT, ROSAT, RXTE, and Swift. We also studied t…
Gamma Ray Bursts Flares detected and observed by the Swift Satellite
Guido Chincarini, Alberto Moretti, Patrizia Romano +11
The detection of flares with the Swift satellite triggered a lot of bservational and theoretical interest in these phenomena. As a consequence a large analysis effort started withi…
Panchromatic study of GRB 060124: from precursor to afterglow
P. Romano, S. Campana, G. Chincarini +35
We present observations of GRB 060124, the first event for which both the prompt and the afterglow emission could be observed simultaneously and in their entirety by the three Swif…
A metal rich molecular cloud surrounds GRB 050904 at redshift 6.3
S. Campana, D. Lazzati, E. Ripamonti +7
GRB050904 is the gamma-ray burst with the highest measured redshift. We performed time resolved X-ray spectroscopy of the late GRB and early afterglow emission. We find robust evid…
Swift observations of GRB050904: the most distant cosmic explosion ever observed
G. Cusumano, V. Mangano, G. Chincarini +30
Swift discovered the high redshift (z=6.29) GRB050904 with the Burst Alert Telescope (BAT) and began observing with its narrow field instruments 161 s after the burst onset. This g…