DETECTION OF GAMMA-RAY EMISSION FROM THE ETA-CARINAE REGION
- Tavani Marco
- Sabatini Sabina
- Pian Elena
- Bulgarelli A
- Caraveo Patrizia
- Viotti RF
- Corcoran MF
- Giuliani Andrea
- Pittori Carlotta
- Verrecchia F
- Vercellone S
- Mereghetti S
- Argan A
- Barbiellini Amidei Guido
- Boffelli Fabrizio
- Cattaneo Paolo Walter
- Chen Rongchang
- Cocco Veronica
- D'Ammando F
- Costa E
- De Paris G
- Del Monte Ettore
- Di Cocco G
- Donnarumma I
- Evangelista Yuri
- Ferrari Attilio
- Feroci Marco
- Fiorini Massimiliano
- Froysland Tom Vidar
- Fuschino F
- Galli M
- Gianotti F
- Labanti C
- Lapshov I
- Lazzarotto F
- Lipari Paolo
- Longo Francesco
- Marisaldi M
- Mastropietro M
- Morelli Ennio
- Moretti Elena
- Morselli Aldo
- Pacciani Luigi
- Pellizzoni A
- Perotti F
- Piano Giovanni
- Picozza Piergiorgio
- Pilia Maura
- Porrovecchio G
- Pucella Gianluca
- PREST, MICHELA
- Rapisarda Massimo
- Rappoldi Andrea
- Rubini Alda
- Soffitta P
- Trifoglio M
- Trois A
- Vallazza Erik Silvio
- Vittorini Valerio
- Zambra A
- Zanello Dino
- Santolamazza P
- Giommi P
- Colafrancesco Sergio
- Antonelli Lucio Angelo
- Salotti L.
DOIAbstract
We present the results of extensive observations by the gamma-ray AGILE satellite of the Galactic region hosting the Carina nebula and the remarkable colliding wind binary Eta Carinae (eta Car) during the period 2007 July-2009 January. We detect a gamma-ray source (1AGL J1043-5931) consistent with the position of eta Car. If 1AGL J1043-5931 is associated with the Car system, our data provide the long sought first detection above 100 MeV of a colliding wind binary. The average gamma-ray flux above 100 MeV and integrated over the preperiastron period 2007 July-2008 October is F(gamma) = (37 +/- 5) x 10(-8) ph cm(-2) s(-1) corresponding to an average gamma-ray luminosity of L(gamma) = 3.4 x 10(34) erg s(-1) for a distance of 2.3 kpc. We also r...
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