FERMI LARGE AREA TELESCOPE CONSTRAINTS ON THE GAMMA-RAY OPACITY OF THE UNIVERSE

Abdo, Aa; Ackermann, M; Ajello, M; Allafort, A; Atwood, Wb; Baldini, Luca; Ballet, J; Barbiellini, G; Baring, Mg; Bastieri, D; Baughman, Bm; Bechtol, K; Bellazzini, R; Berenji, B; Bhat, Pn; Blandford, Rd; Bloom, Ed; Bonamente, E; Borgland, Aw; Bouvier, A; Brandt, Tj; Bregeon, J; Brez, A; Briggs, Ms; Brigida, M; Bruel, P; Buehler, R; Burnett, Th; Buson, S; Caliandro, Ga; Cameron, Ra; Caraveo, Pa; Carrigan, S; Casandjian, Jm; Cavazzuti, E; Cecchi, C; Celik, O; Charles, E; Chekhtman, A; Chen, Aw; Cheung, Cc; Chiang, J; Ciprini, S; Claus, R; Cohen Tanugi, J; Connaughton, V; Conrad, J; Costamante, L; Dermer, Cd; de Angelis, A; de Palma, F; Digel, Sw; Dingus, Bl; Silva, Ede; Drell, Ps; Dubois, R; Favuzzi, C; Fegan, Sj; Finke, J; Fortin, P; Fukazawa, Y; Funk, S; Fusco, P; Gargano, F; Gasparrini, D; Gehrels, N; Germani, S; Giglietto, N; Gilmore, Rc; Giommi, P; Giordano, F; Giroletti, M; Glanzman, T; Godfrey, G; Granot, J; Greiner, J; Grenier, Ia; Grove, Je; Guiriec, S; Gustafsson, M; Hadasch, D; Hayashida, M; Hays, E; Horan, D; Hughes, Re; Johannesson, G; Johnson, As; Johnson, Rp; Johnson, Wn; Kamae, T; Katagiri, H; Kataoka, J; Knodlseder, J; Kocevski, D; Kuss, M; Lande, J; Latronico, L; Lee, Sh; Garde, Ml; Longo, F; Loparco, F; Lott, B; Lovellette, Mn; Lubrano, P; Makeev, A; Mazziotta, N; McConville, W; McEnery, Je; McGlynn, S; Mehault, J; Meszaros, P; Michelson, Pf; Mizuno, T; Moiseev, Aa; Monte, C; Monzani, Me; Moretti, E; Morselli, A; Moskalenko, Iv; Murgia, S; Nakamori, T; Naumann Godo, M; Nolan, Pl; Norris, Jp; Nuss, E; Ohno, M; Ohsugi, T; Okumura, A; Omodei, N; Orlando, E; Ormes, Jf; Ozaki, M; Paneque, D; Panetta, Jh; Parent, D; Pelassa, V; Pepe, M; Pesce Rollins, M; Piron, F; Porter, Ta; Primack, Jr; Raino, S; Rando, R; Razzano, Massimiliano; Razzaque, S; Reimer, A; Reimer, O; Reyes, Lc; Ripken, J; Ritz, S; Romani, Rw; Roth, M; Sadrozinski, Hfw; Sanchez, D; Sander, A; Scargle, Jd; Schalk, Tl; Sgro, C; Shaw, Ms; Siskind, Ej; Smith, Pd; Spandre, G; Spinelli, P; Stecker, Fw; Strickman, Ms; Suson, Dj; Tajima, H; Takahashi, H; Takahashi, T; Tanaka, T; Thayer, Jb; Thayer, Jg; Thompson, Dj; Tibaldo, L; Torres, Df; Tosti, G; Tramacere, A; Uchiyama, Y; Usher, Tl; Vandenbroucke, J; Vasileiou, V; Vilchez, N; Vitale, V; von Kienlin, A; Waite, Ap; Wang, P; Wilson Hodge, C; Winer, Bl; Wood, Ks; Yamazaki, R; Yang, Z; Ylinen, T; Ziegler, M.

doi:10.1088/0004-637X/723/2/1082

The extragalactic background light (EBL) includes photons with wavelengths from ultraviolet to infrared, which are effective at attenuating gamma rays with energy above ~10 GeV during propagation from sources at cosmological distances. This results in a redshift- and energy-dependent attenuation of the γ-ray flux of extragalactic sources such as blazars and gamma-ray bursts (GRBs). The Large Area Telescope on board Fermi detects a sample of γ-ray blazars with redshift up to z ~ 3, and GRBs with redshift up to z ~ 4.3. Using photons above 10 GeV collected by Fermi over more than one year of observations for these sources, we investigate the effect of γ-ray flux attenuation by the EBL. We place upper limits on the γ-ray opacity of the universe at various energies and redshifts and compare this with predictions from well-known EBL models. We find that an EBL intensity in the optical-ultraviolet wavelengths as great as predicted by the "baseline" model of Stecker et al. can be ruled out with high confidence.

Autori interni:	Abdo AA Ackermann M Ajello M Allafort A Atwood WB BALDINI, LUCA Ballet J Barbiellini G Baring MG Bastieri D Baughman BM Bechtol K Bellazzini R Berenji B Bhat PN Blandford RD Bloom ED Bonamente E Borgland AW Bouvier A Brandt TJ Bregeon J Brez A Briggs MS Brigida M Bruel P Buehler R Burnett TH Buson S Caliandro GA Cameron RA Caraveo PA Carrigan S Casandjian JM Cavazzuti E Cecchi C Celik O Charles E Chekhtman A Chen AW Cheung CC Chiang J Ciprini S Claus R Cohen Tanugi J Connaughton V Conrad J Costamante L Dermer CD de Angelis A de Palma F Digel SW Dingus BL Silva EDE Drell PS Dubois R Favuzzi C Fegan SJ Finke J Fortin P Fukazawa Y Funk S Fusco P Gargano F Gasparrini D Gehrels N Germani S Giglietto N Gilmore RC Giommi P Giordano F Giroletti M Glanzman T Godfrey G Granot J Greiner J Grenier IA Grove JE Guiriec S Gustafsson M Hadasch D Hayashida M Hays E Horan D Hughes RE Johannesson G Johnson AS Johnson RP Johnson WN Kamae T Katagiri H Kataoka J Knodlseder J Kocevski D Kuss M Lande J Latronico L Lee SH Garde ML Longo F Loparco F Lott B Lovellette MN Lubrano P Makeev A Mazziotta N McConville W McEnery JE McGlynn S Mehault J Meszaros P Michelson PF Mizuno T Moiseev AA Monte C Monzani ME Moretti E Morselli A Moskalenko IV Murgia S Nakamori T Naumann Godo M Nolan PL Norris JP Nuss E Ohno M Ohsugi T Okumura A Omodei N Orlando E Ormes JF Ozaki M Paneque D Panetta JH Parent D Pelassa V Pepe M Pesce Rollins M Piron F Porter TA Primack JR Raino S Rando R RAZZANO, MASSIMILIANO Razzaque S Reimer A Reimer O Reyes LC Ripken J Ritz S Romani RW Roth M Sadrozinski HFW Sanchez D Sander A Scargle JD Schalk TL Sgro C Shaw MS Siskind EJ Smith PD Spandre G Spinelli P Stecker FW Strickman MS Suson DJ Tajima H Takahashi H Takahashi T Tanaka T Thayer JB Thayer JG Thompson DJ Tibaldo L Torres DF Tosti G Tramacere A Uchiyama Y Usher TL Vandenbroucke J Vasileiou V Vilchez N Vitale V von Kienlin A Waite AP Wang P Wilson Hodge C Winer BL Wood KS Yamazaki R Yang Z Ylinen T Ziegler M. mostra contributor esterni nascondi contributor esterni
Autori:	Abdo AA; Ackermann M; Ajello M; Allafort A; Atwood WB; Baldini L; Ballet J; Barbiellini G; Baring MG; Bastieri D; Baughman BM; Bechtol K; Bellazzini R; Berenji B; Bhat PN; Blandford RD; Bloom ED; Bonamente E; Borgland AW; Bouvier A; Brandt TJ; Bregeon J; Brez A; Briggs MS; Brigida M; Bruel P; Buehler R; Burnett TH; Buson S; Caliandro GA; Cameron RA; Caraveo PA; Carrigan S; Casandjian JM; Cavazzuti E; Cecchi C; Celik O; Charles E; Chekhtman A; Chen AW; Cheung CC; Chiang J; Ciprini S; Claus R; Cohen-Tanugi J; Connaughton V; Conrad J; Costamante L; Dermer CD; de Angelis A; de Palma F; Digel SW; Dingus BL; Silva EDE; Drell PS; Dubois R; Favuzzi C; Fegan SJ; Finke J; Fortin P; Fukazawa Y; Funk S; Fusco P; Gargano F; Gasparrini D; Gehrels N; Germani S; Giglietto N; Gilmore RC; Giommi P; Giordano F; Giroletti M; Glanzman T; Godfrey G; Granot J; Greiner J; Grenier IA; Grove JE; Guiriec S; Gustafsson M; Hadasch D; Hayashida M; Hays E; Horan D; Hughes RE; Johannesson G; Johnson AS; Johnson RP; Johnson WN; Kamae T; Katagiri H; Kataoka J; Knodlseder J; Kocevski D; Kuss M; Lande J; Latronico L; Lee SH; Garde ML; Longo F; Loparco F; Lott B; Lovellette MN; Lubrano P; Makeev A; Mazziotta N; McConville W; McEnery JE; McGlynn S; Mehault J; Meszaros P; Michelson PF; Mizuno T; Moiseev AA; Monte C; Monzani ME; Moretti E; Morselli A; Moskalenko IV; Murgia S; Nakamori T; Naumann-Godo M; Nolan PL; Norris JP; Nuss E; Ohno M; Ohsugi T; Okumura A; Omodei N; Orlando E; Ormes JF; Ozaki M; Paneque D; Panetta JH; Parent D; Pelassa V; Pepe M; Pesce-Rollins M; Piron F; Porter TA; Primack JR; Raino S; Rando R; Razzano M; Razzaque S; Reimer A; Reimer O; Reyes LC; Ripken J; Ritz S; Romani RW; Roth M; Sadrozinski HFW; Sanchez D; Sander A; Scargle JD; Schalk TL; Sgro C; Shaw MS; Siskind EJ; Smith PD; Spandre G; Spinelli P; Stecker FW; Strickman MS; Suson DJ; Tajima H; Takahashi H; Takahashi T; Tanaka T; Thayer JB; Thayer JG; Thompson DJ; Tibaldo L; Torres DF; Tosti G; Tramacere A; Uchiyama Y; Usher TL; Vandenbroucke J; Vasileiou V; Vilchez N; Vitale V; von Kienlin A; Waite AP; Wang P; Wilson-Hodge C; Winer BL; Wood KS; Yamazaki R; Yang Z; Ylinen T; Ziegler M
Titolo:	FERMI LARGE AREA TELESCOPE CONSTRAINTS ON THE GAMMA-RAY OPACITY OF THE UNIVERSE
Anno del prodotto:	2010
Digital Object Identifier (DOI):	10.1088/0004-637X/723/2/1082
Appare nelle tipologie:	1.1 Articolo in rivista

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