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Fermi LARGE AREA TELESCOPE OBSERVATIONS OF BLAZAR 3C 279 OCCULTATIONS BY THE SUN
- Barbiellini, G;
- Bastieri, D;
- Bechtol, K;
- Bellazzini, R;
- Blandford, RD;
- Borgland, AW;
- Bregeon, J;
- Bruel, P;
- Buehler, R;
- Buson, S;
- Caliandro, GA;
- Cameron, RA;
- Caraveo, PA;
- Cavazzuti, E;
- Cecchi, C;
- Chaves, RCG;
- Chekhtman, A;
- Cheung, CC;
- Chiang, J;
- Ciprini, S;
- Claus, R;
- Cohen-Tanugi, J;
- D'Ammando, F;
- de Angelis, A;
- Dermer, CD;
- Digel, SW;
- do Couto e Silva, E;
- Drell, PS;
- Drlica-Wagner, A;
- Favuzzi, C;
- Focke, WB;
- Franckowiak, A;
- Fukazawa, Y;
- Fusco, P;
- Gargano, F;
- Gasparrini, D;
- Germani, S;
- Giglietto, N;
- Giommi, P;
- Giordano, F;
- Giroletti, M;
- Glanzman, T;
- Godfrey, G;
- Grenier, IA;
- Grove, JE;
- Guiriec, S;
- Hadasch, D;
- Hayashida, M;
- Hays, E;
- Hughes, RE;
- Jackson, MS;
- Jogler, T;
- Knödlseder, J;
- Kuss, M;
- Lande, J;
- Larsson, S;
- Longo, F;
- Loparco, F;
- Lovellette, MN;
- Lubrano, P;
- Mazziotta, MN;
- Mehault, J;
- Michelson, PF;
- Mizuno, T;
- Moiseev, AA;
- Monte, C;
- Monzani, ME;
- Morselli, A;
- Moskalenko, IV;
- Murgia, S;
- Nemmen, R;
- Nuss, E;
- Ohsugi, T;
- Omodei, N;
- Orienti, M;
- Orlando, E;
- Paneque, D;
- Perkins, JS;
- Piron, F;
- Pivato, G;
- Prokhorov, D;
- Rainò, S;
- Razzano, M;
- Razzaque, S;
- Reimer, A;
- Reimer, O;
- Ritz, S;
- Romoli, C;
- Sánchez-Conde, M;
- Sanchez, DA;
- Sgrò, C;
- Siskind, EJ;
- Spandre, G;
- Spinelli, P;
- Takahashi, H;
- Tanaka, T;
- Tibaldo, L;
- Tinivella, M;
- Tosti, G;
- Troja, E;
- Usher, TL;
- Vandenbroucke, J;
- Vasileiou, V;
- Vianello, G;
- Vitale, V;
- Waite, AP;
- Winer, BL;
- Wood, KS;
- Yang, Z
- et al.
Published Web Location
https://doi.org/10.1088/0004-637x/784/2/118Abstract
Observations of occultations of bright γ-ray sources by the Sun may reveal predicted pair halos around blazars and/or new physics, such as, e.g., hypothetical light dark matter particles-axions. We use Fermi Gamma-Ray Space Telescope (Fermi) data to analyze four occultations of blazar 3C 279 by the Sun on October 8 each year from 2008 to 2011. A combined analysis of the observations of these occultations allows a point-like source at the position of 3C 279 to be detected with significance of ≈3σ, but does not reveal any significant excess over the flux expected from the quiescent Sun. The likelihood ratio test rules out complete transparency of the Sun to the blazar γ-ray emission at a 3σ confidence level.
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