@article{d1e98ac0f74c45a0a0d6a8615ea4d255,
title = "Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations with the Fermi Large Area Telescope",
abstract = "We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area Telescope data, we find no evidence for ALPs and exclude couplings above 5×10-12 GeV-1 for ALP masses 0.5ma5 neV at 95\% confidence. The limits are competitive with the sensitivity of planned laboratory experiments, and, together with other bounds, strongly constrain the possibility that ALPs can reduce the γ-ray opacity of the Universe.",
author = "\{(The Fermi-LAT Collaboration)\} and M. Ajello and A. Albert and B. Anderson and L. Baldini and G. Barbiellini and D. Bastieri and R. Bellazzini and E. Bissaldi and Blandford, \{R. D.\} and Bloom, \{E. D.\} and R. Bonino and E. Bottacini and J. Bregeon and P. Bruel and R. Buehler and Caliandro, \{G. A.\} and Cameron, \{R. A.\} and M. Caragiulo and Caraveo, \{P. A.\} and C. Cecchi and A. Chekhtman and S. Ciprini and J. Cohen-Tanugi and J. Conrad and F. Costanza and F. D'Ammando and \{De Angelis\}, A. and \{De Palma\}, F. and R. Desiante and \{Di Mauro\}, M. and \{Di Venere\}, L. and A. Dom{\'i}nguez and Drell, \{P. S.\} and C. Favuzzi and Focke, \{W. B.\} and A. Franckowiak and Y. Fukazawa and S. Funk and P. Fusco and F. Gargano and D. Gasparrini and N. Giglietto and T. Glanzman and G. Godfrey and S. Guiriec and D. Horan and G. J{\'o}hannesson and M. Katsuragawa and S. Kensei and M. Kuss",
note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",
year = "2016",
month = apr,
day = "20",
doi = "10.1103/PhysRevLett.116.161101",
language = "English",
volume = "116",
journal = "Physical Review Letters",
issn = "0031-9007",
number = "16",
}