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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of PaviaIT2.8k papers
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60 papers · 1 filter
XMM-Newton discovery of 2.6 s pulsations in the soft gamma-ray repeater SGR 1627-41
P. Esposito, A. Tiengo, S. Mereghetti +6
After nearly a decade of quiescence, the soft gamma-ray repeater SGR 1627-41 reactivated on 2008 May 28 with a bursting episode followed by a slowly decaying enhancement of its per…
The June 2008 flare of Markarian 421 from optical to TeV energies
The Agile Collaboration, Webt Collaboration, Magic Collaboration +2
We present optical, X-ray, high energy ( GeV) and very high energy ( GeV; VHE) observations of the high-frequency peaked blazar Mrk 421 taken betwee…
High energy variability of 3C 273 during the AGILE multiwavelength campaign of December 2007 - January 2008
L. Pacciani, I. Donnarumma, V. Vittorini +52
We report the results of a 3-weeks multi-wavelength campaign on the flat spectrum radio quasar 3C 273 carried out with the AGILE gamma-ray mission, covering the 30 MeV -50 GeV and…
On the evolution of the Gamma- and X-ray luminosities of Pulsar Wind Nebulae
Fabio Mattana, Maurizio Falanga, Diego Götz +7
Pulsar wind nebulae are a prominent class of very high energy (E > 0.1 TeV) Galactic sources. Their Gamma-ray spectra are interpreted as due to inverse Compton scattering of ultrar…
Chandra astrometry sets a tight upper limit to the proper motion of SGR 1900+14
A. De Luca, P. A. Caraveo, P. Esposito +1
The soft gamma-ray repeater (SGR) SGR 1900+14 lies a few arcminutes outside the edge of the shell supernova remnant (SNR) G42.8+0.6. A physical association between the two systems…
AGILE observation of a gamma-ray flare from the blazar 3C 279
A. Giuliani, F. D'Ammando, S. Vercellone +56
Context. We report the detection by the AGILE satellite of an intense gamma-ray flare from the gamma-ray source 3EG J1255-0549, associated to the Flat Spectrum Radio Quasar 3C 279,…
High-Resolution Timing Observations of Spin-Powered Pulsars with the AGILE Gamma-Ray Telescope
A. Pellizzoni, M. Pilia, A. Possenti +67
AGILE is a small gamma-ray astronomy satellite mission of the Italian Space Agency dedicated to high-energy astrophysics launched in 2007 April. Its 1 microsecond absolute time tag…
AGILE detection of intense gamma-ray emission from the blazar PKS 1510-089
G. Pucella, V. Vittorini, F. D'Ammando +59
We report the detection by the AGILE (Astro-rivelatore Gamma a Immagini LEggero) satellite of an intense gamma-ray flare from the source AGL J1511-0909, associated with the powerfu…
Gamma-ray burst detection with the AGILE mini-calorimeter
M. Marisaldi, C. Labanti, F. Fuschino +70
The Mini-Calorimeter (MCAL) instrument on-board the AGILE satellite is a non-imaging gamma-ray scintillation detector sensitive in the 300keV-100MeV energy range with a total on-ax…
Multiwavelength observations of 3C 454.3. I. The AGILE 2007 November campaign on the "Crazy Diamond"
S. Vercellone, A. W. Chen, V. Vittorini +68
[Abridged] We report on a multiwavelength observation of the blazar 3C 454.3 (which we dubbed "crazy diamond") carried out on November 2007 by means of the astrophysical satellites…
AGILE detection of delayed gamma-ray emission from GRB 080514B
A. Giuliani, S. Mereghetti, F. Fornari +55
GRB 080514B is the first gamma ray burst (GRB), since the time of EGRET, for which individual photons of energy above several tens of MeV have been detected with a pair-conversion…
AGILE detection of variable gamma-ray activity from the blazar S5 0716+714 in September-October 2007
A. W. Chen, F. D'Ammando, M. Villata +65
We report the gamma-ray activity from the intermediate BL Lac S5 0716+714 during observations acquired by the AGILE satellite in September and October 2007. These detections of act…
Long-term AGILE monitoring of the puzzling gamma-ray source 3EG J1835+5918
A. Bulgarelli, M. Tavani, P. Caraveo +54
We present the AGILE gamma-ray observations of the field containing the puzzling gamma-ray source 3EG J1835+5918. This source is one of the most remarkable unidentified EGRET sourc…
The AGILE Mission
M. Tavani
AGILE is an Italian Space Agency mission dedicated to the observation of the gamma-ray Universe. The AGILE very innovative instrumentation combines for the first time a gamma-ray i…
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…
The 2008 May burst activation of SGR 1627-41
P. Esposito, G. L. Israel, S. Zane +16
In May 2008 the soft gamma-ray repeater SGR 1627-41 resumed its bursting activity after nearly a decade of quiescence. After detection of a bright burst, Swift pointed its X-ray te…
Photon propagation and the VHE gamma-ray spectra of blazars: how transparent is really the Universe?
A. De Angelis, O. Mansutti, M. Persic +1
Recent findings by gamma-ray Cherenkov telescopes suggest a higher transparency of the Universe to very-high-energy (VHE) photons than expected from current models of the Extragala…
New results on solar neutrino fluxes from 192 days of Borexino data
The Borexino Collaboration
We report the direct measurement of the ^7Be solar neutrino signal rate performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso. The interaction rate of the…
XMM-Newton observations of CXOU J010043.1-721134: the first deep look at the soft X-ray emission of a magnetar
A. Tiengo, P. Esposito, S. Mereghetti
We present the analysis of six XMM-Newton observations of the Anomalous X-ray Pulsar CXOU J010043.1-721134, the magnetar candidate characterized by the lowest interstellar absorpti…
Detectability of gamma-ray emission from classical novae with Swift/BAT
F. Senziani, G. K. Skinner, P. Jean +1
Classical novae are expected to emit gamma rays during their explosions. The most important contribution to the early gamma-ray emission comes from the annihilation with electrons…
Quantum Vacuum Friction in Highly Magnetized Neutron Stars
Arnaud Dupays, Carlo Rizzo, Dimitar Bakalov +1
In this letter we calculate the energy loss of highly magnetized neutron star due to friction with quantum vacuum, namely Quantum Vacuum Friction (QVF). Taking into account one-loo…
Dark Matter - Dark Energy coupling biasing parameter estimates from CMB data
Giuseppe La Vacca, Loris P. L. Colombo, Luca Vergani +1
When CMB data are used to derive cosmological parameters, their very choice does matter: some parameter values can be biased if the parameter space does not cover the "true" model.…
PSR J0737-3039: Interacting Pulsars in X-Rays
A. Pellizzoni, A. Tiengo, A. De Luca +2
We present the results of a ~230 ks long X-ray observation of the relativistic double-pulsar system PSR J0737-3039 obtained with the XMM-Newton satellite in 2006 October. We confir…
AGILE detection of a strong gamma-ray flare from the blazar 3C 454.3
S. Vercellone, A. W. Chen, A. Giuliani +50
We report the first blazar detection by the AGILE satellite. AGILE detected 3C 454.3 during a period of strongly enhanced optical emission in July 2007. AGILE observed the source w…