DISCOVERY OF PULSED \gamma-RAYS FROM PSR J0034–0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND \gamma-RAY EMISSION REGIONS
Abdo, A. A. AA ; Ackermann, M. ; Ajello, M. ; Giommi, P. ; Cavazzuti, E. ; Colafrancesco, S. ; et al.
Jul - 2009
ISSN : 0004-637X ;
journal : The Astrophysical

Issue : 1
type: Article Journal

Abstract
We present observations of the young supernova remnant (SNR) RX J1713.73946 with the Fermi Large Area Telescope (LAT). We clearly detect a source positionally coincident with the SNR. The source is extended with a best-fit extension of 0.°55 ± 0.°04 matching the size of the non-thermal X-ray and TeV gamma-ray emission from the remnant. The positional coincidence and the matching extended emission allow us to identify the LAT source with SNR RX J1713.73946. The spectrum of the source can be described by a very hard power law with a photon index of “ = 1.5 ± 0.1 that coincides in normalization with the steeper H.E.S.S.-detected gamma-ray spectrum at higher energies. The broadband gamma-ray emission is consistent with a leptonic origin as the dominant mechanism for the gamma-ray emission.

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