Auteur(s): Aharonian F., Bazer-Bachi A.R., Becherini Y., Boisson C., Borrel V., Brion E., Brun P., Boutelier T., Charbonnier A., Chounet L.-M., Coignet G., Degrange B., Djannati-Ataï A., Dubois F., Dubus G., Espigat P., Farnier C., Feinstein F., Fiasson A., Fontaine G., Gallant Y., Gérard L., Giebels B., Glicenstein J.F., Goret P., Henri G., Jacholkowska A., Kh´elifi B., Marcowith A., Vasileiadis G.
(Article) Publié:
Astronomy & Astrophysics, vol. 499 p.273-277 (2009)
Texte intégral en Openaccess : 
Ref HAL: in2p3-00392048_v1
Ref Arxiv: 0904.0361
DOI: 10.1051/0004-6361/200811564
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
22 citations
Résumé:
Observations of the globular cluster 47 Tucanae (NGC 104), which contains at least 23 millisecond pulsars, were performed with the H.E.S.S. telescope system. The observations lead to an upper limit of F(E>800 GeV) < 6.7e-13 / cm^2 s on the integral gamma-ray photon flux from 47 Tucanae. Considering millisecond pulsars as the unique potential source of gamma-rays in the globular cluster, constraints based on emission models are derived: on the magnetic field in the average pulsar nebula and on the conversion efficiency of spin-down power to gamma-ray photons or to relativistic leptons.
Commentaires: 5 pages, 2 figures, accepted for publication in A&A