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15 papers · 2 filters
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…
The Fermi Gamma Ray Space Telescope discovers the Pulsar in the Young Galactic Supernova-Remnant CTA 1
Fermi LAT Collaboration
Energetic young pulsars and expanding blast waves (supernova remnants, SNRs) are the most visible remains after massive stars, ending their lives, explode in core-collapse supernov…
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,…
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…
Rising optical afterglows seen by TAROT
B. Gendre, A. Klotz, G. Stratta +8
We present the multi-wavelength study of those gamma-ray bursts observed by TAROT. These events are characterized by the presence at early time of a rising in their optical light c…
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…
AGILE detection of variable gamma-ray activity from the blazar S5 0716+714 during September-October 2007
F. D'Ammando, A. W. Chen, M. Villata +10
We report the gamma-ray activity from the Intermediate BL Lac S5 0716+714 during 2007 September-October observations by the AGILE satellite, coincident with a period of intense opt…
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…
AGILE and Swift simultaneous observations of the blazar S50716+714 during the bright flare of October 2007
P. Giommi, S. Colafrancesco, S. Cutini +15
We present the results of a series of optical, UV, X-ray and gamma-ray observations of the BL Lac object S50716+714 carried out by the Swift and AGILE satellites in late 2007 when…
Early emission of rising optical afterglows: The case of GRB 060904B and GRB 070420
A. Klotz, B. Gendre, G. Stratta +8
We present the time-resolved optical emission of gamma-ray bursts GRB 060904B and GRB 070420 during their prompt and early afterglow phases. We used time resolved photometry from o…
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…