During its first 2 years of operation, the gamma-ray AGILE satellite accumulated an extensive dataset for the Galactic plane. The data have been monitored for transient sources and several gamma-ray sources were detected. Their variability and possible association were studied. In this talk we will focus on the results of extensive observations of the Carina Region during the time period 2007 July-2009 January, for a total livetime of similar to 130 days. The region is extremely complex, hosting massive star formation, with the remarkable colliding wind binary Eta Carinae, massive star clusters and HII regions (e.g. NGC 3324, RCW49, Westerlund II) and a giant molecular cloud extending over 150 pc (between I=284.7 and 289). The Carina Nebula itself is the largest and IR highest surface brightness nebula of the Southern emisphere. We monitored several gamma ray sources in the Carina Region. In particular we detect a gamma ray source (1AGLJ1043-5931) consistent with the position of Eta Carinae and report a remarkable 2-days gamma-ray flaring episode from this source on 2008 October 11-13. If 1AGL J1043-5931 is associated with the Eta Car system, our data provide the long sought first detection above 100 MeV of a colliding wind binary. (C) 2010 Elsevier B.V. All rights reserved.
Galactic sources science with AGILE: The case of the Carina Region / Sabatini S; Tavani M; Pian E; Bulgarelli A; Caraveo P; Viotti R; Corcoran MF; Giuliani A; Pittori C; Verrecchia F; Vercellone S; Mereghetti S; Argan A; Barbiellini G; Boffelli F; Cattaneo PW; Chen AW; Cocco V; DAmmando F; Costa E; De Paris G; Del Monte E; Di Cocco G; Donnarumma I; Evangelista Y; Ferrari A; Feroci M; Fiorini M; Froysland T; Fuschino F; Galli M; Gianotti F; Labanti C; Lapshov I; Lazzarotto F; Lipari P; Longo F; Marisaldi M; Mastropietro M; Morelli E; Moretti E; Morselli A; Pacciani L; Pellizzoni A; Perotti F; Piano G; Picozza P; Pilia M; Porrovecchio G; Pucella G; Prest M; Rapisarda M; Rappoldi A; Rubini A; Soffitta P; Trifoglio M; Trois A; Vallazza E; Vittorini V; Zambra A; Zanello D; Santolamazza P; Giommi P; Colafrancesco S; Antonelli LA; Salotti L. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - STAMPA. - 630:1(2011), pp. 193-197. [10.1016/j.nima.2010.06.062]
Galactic sources science with AGILE: The case of the Carina Region
D'AMMANDO, FILIPPO;
2011
Abstract
During its first 2 years of operation, the gamma-ray AGILE satellite accumulated an extensive dataset for the Galactic plane. The data have been monitored for transient sources and several gamma-ray sources were detected. Their variability and possible association were studied. In this talk we will focus on the results of extensive observations of the Carina Region during the time period 2007 July-2009 January, for a total livetime of similar to 130 days. The region is extremely complex, hosting massive star formation, with the remarkable colliding wind binary Eta Carinae, massive star clusters and HII regions (e.g. NGC 3324, RCW49, Westerlund II) and a giant molecular cloud extending over 150 pc (between I=284.7 and 289). The Carina Nebula itself is the largest and IR highest surface brightness nebula of the Southern emisphere. We monitored several gamma ray sources in the Carina Region. In particular we detect a gamma ray source (1AGLJ1043-5931) consistent with the position of Eta Carinae and report a remarkable 2-days gamma-ray flaring episode from this source on 2008 October 11-13. If 1AGL J1043-5931 is associated with the Eta Car system, our data provide the long sought first detection above 100 MeV of a colliding wind binary. (C) 2010 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
