2024-03-29T13:46:36Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/414032016-02-17T05:09:47Zcom_10261_45com_10261_4col_10261_298
Abdo, Aous A.
Ackermann, Markus
Ajello, Marco
Allafort, Alice
Baldini, Luca
Ballet, Jean
Barbiellini, Guido
Bastieri, Denis
Bechtol, Keith
Bellazzini, Ronaldo
Berenji, Bijan
Gehrels, Neil
Uchiyama, Yasunobu
Usher, Tracy L.
Cohen-Tanugi, Johan
Vandenbroucke, Justin
Vasileiou, Vlasios
Vilchez, Nicolás
Vitale, Vincenzo
Bregeon, Jean
Waite, Anthony P.
Piron, Frédéric
Wallace, Eric
Germani, Stefano
Wang, Ping
Winer, Brian L.
Wood, Kent S.
Cominsky, Lynn R.
Yang, Zhaoyu
Ylinen, Tomi
Ziegler, Marcus
Brez, Alessandro
Itoh, Ryosuke
Brigida, Monica
Bruel, Philippe
Giglietto, Nicola
Buehler, Rolf
Burnett, Thompson H.
Caliandro, Giuseppe Andrea
Cameron, Robert A.
Conrad, Jan
Caraveo, Patrizia A.
Carrigan, Svenja
Jackson, Miranda S.
Casandjian, Jean-Marc
Cecchi, Claudia
Çelik, Özlem
Giordano, Francesco
Chaty, Sylvain
Chekhtman, Alexandre
Cheung, C. C. Teddy
Dermer, Charles Dennison
Palma, Francesco de
Digel, Seth W.
Murgia, Simona
Couto e Silva, Eduardo do
Monzani, Maria Elena
Drell, Persis S.
Dubois, Richard
Godfrey, Gary
Dumora, Denis
Favuzzi, Cecilia
Fegan, Stephen J.
Ferrara, Elizabeth C.
Frailis, Marco
Johannesson, Gueolaugur
Fukazawa, Yasushi
Fusco, Piergiorgio
Gargano, Fabio
Grenier, Isabelle A.
Grondin, Marie-Hélène
Grove, J. Eric
Guillemot, Lucas
Bonamente, Emanuele
Guiriec, Sylvain
Moskalenko, Igor V.
Johnson, A. S.
Hadasch, Daniela
Hanabata, Yoshitaka
Harding, Alice K.
Hayashida, Masaaki
Hays, Elizabeth
Hill, Adam B.
Horan, Deirdre
Hughes, Richard E.
Johnson, W. Neil
Kamae, Tuneyoshi
Katagiri, Hideaki
Kataoka, Jun
Ciprini, Stefano
Kerr, Matthew
Porter, Troy A.
Knödlseder, Jürgen
Kuss, M.
Lande, Joshua
Nakamori, Takeshi
Latronico, Luca
Lee, Shiu-Hang
Lemoine-Goumard, Marianne
Livingstone, Maggie
Smith, Patrick D.
Llena-Garde, Maja
Longo, Francesco
Rainò, Silvia
Loparco, Francesco
Lovellette, Michael N.
Lubrano, Pasquale
Makeev, Andrey
Naumann-Godo, Melitta
Mazziotta, Mario Nicola
McEnery, Julie E.
Spandre, Gloria
Mehault, Jeremie
Michelson, Peter F.
Mitthumsiri, Warit
Rando, Riccardo
Mizuno, Takafumi
Moiseev, Alex A.
Monte, Claudia
Nolan, Pat L.
Norris, Jay P.
Nuss, Eric
Bouvier, Aurelien
Ohsugi, Takashi
Blandford, Roger D.
Okumura, Akira
Omodei, Nicola
Razzano, Massimiliano
Orlando, Elena
Ormes, Jonathan F.
Ozaki, Masanobu
Panetta, Jim H.
Parent, D.
Spinelli, Paolo
Pelassa, Véronique
Pepe, Monica
Pesce-Rollins, Melissa
Reimer, Anita
Reimer, Olaf
Reposeur, Thierry
Rodríguez, Ana Yaiza
Chiang, James
Romani, Roger W.
Borgland, Anders W.
Strickman, Mark Samuel
Roth, Marshall
Sadrozinski, Hartmut F. W.
Sander, Aaron
Saz Parkinson, Pablo M.
Scargle, Jeffrey D.
Sgrò, Carmelo
Siskind, Eric J.
Smith, David A.
Suson, Daniel Jeffrey
Takahashi, Hiromitsu
Takahashi, Tadayuki
Tanaka, Takaaki
Morselli, Aldo
Thayer, Jana B.
Claus, Rachel
Thayer, John Gregg
Thompson, David J.
Tibaldo, Luigi
Brandt, Theresa J.
Tibolla, Omar
Torres, Diego F.
Tosti, Gino
Tramacere, Andrea
2011-10-19T11:40:03Z
2011-10-19T11:40:03Z
2010-10-13
Astrophysical Journal 723 (1) : 649 (2010)
0004-637X
http://hdl.handle.net/10261/41403
10.1088/0004-637X/723/1/649
1538-4357
The Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope detected a γ-ray source that is spatially consistent with the location of Eta Carinae. This source has been persistently bright since the beginning of the LAT survey observations (from 2008 August to 2009 July, the time interval considered here). The γ-ray signal is detected significantly throughout the LAT energy band (i.e., up to ~100 GeV). The 0.1-100 GeV energy spectrum is well represented by a combination of a cutoff power-law model (<10 GeV) and a hard power-law component (>10 GeV). The total flux (>100 MeV) is 3.7+0.3 –0.1 × 10–7 photons s–1 cm–2, with additional systematic uncertainties of 10%, and consistent with the average flux measured by AGILE. The light curve obtained by Fermi is consistent with steady emission. Our observations do not confirm the presence of a γ-ray flare in 2008 October, as reported by Tavani et al., although we cannot exclude that a flare lasting only a few hours escaped detection by the Fermi LAT. We also do not find any evidence for γ-ray variability that correlates with the large X-ray variability of Eta Carinae observed during 2008 December and 2009 January. We are thus not able to establish an unambiguous identification of the LAT source with Eta Carinae.
eng
openAccess
Binaries: general
Stars: individual (Eta Carinae)
Supergiants
Fermi Large Area Telescope Observation of a Gamma-ray Source at the Position of Eta Carinae
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