학술논문
Fermi LARGE AREA TELESCOPE OBSERVATIONS OF BLAZAR 3C 279 OCCULTATIONS BY THE SUN
Document Type
article
Author
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
Source
The Astrophysical Journal. 784(2)
Subject
Language
Abstract
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.