XMM-Newton observations reveal the X-ray counterpart of the very-high-energy gamma-ray source HESSJ1640-465 - INSPIRE

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XMM-Newton observations reveal the X-ray counterpart of the very-high-energy gamma-ray source HESSJ1640-465

S. Funk
(
- KIPAC, Menlo Park and
- Heidelberg, Max Planck Inst. and
- Leeds U. and
- Dublin Inst. and
- Stanford U., HEPL
)
,
J.A. Hinton
(
- KIPAC, Menlo Park and
- Heidelberg, Max Planck Inst. and
- Leeds U. and
- Dublin Inst. and
- Stanford U., HEPL
)
,
G. Puhlhofer
(
- KIPAC, Menlo Park and
- Heidelberg, Max Planck Inst. and
- Leeds U. and
- Dublin Inst. and
- Stanford U., HEPL
)
,
F.A. Aharonian
(
- KIPAC, Menlo Park and
- Heidelberg, Max Planck Inst. and
- Leeds U. and
- Dublin Inst. and
- Stanford U., HEPL
)
,
W. Hofmann
(
- KIPAC, Menlo Park and
- Heidelberg, Max Planck Inst. and
- Leeds U. and
- Dublin Inst. and
- Stanford U., HEPL
)

Jan, 2007

8 pages

Published in:

Astrophys.J. 662 (2007) 517-524

e-Print:

astro-ph/0701166 [astro-ph]

DOI:

10.1086/516567

Report number:

SLAC-PUB-12295

View in:

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Abstract: (arXiv)

We present X-ray observations of the as of yet unidentified very high-energy (VHE) gamma-ray source HESSJ1640-465 with the aim of establishing a counterpart of this source in the keV energy range, and identifying the mechanism responsible for the VHE emission. The 21.8 ksec XMM-Newton observation of HESSJ1640-465 in September 2005 represents a significant improvement in sensitivity and angular resolution over previous ASCA studies in this region. These new data show a hard-spectrum X-ray emitting object at the centroid of the H.E.S.S. source, within the shell of the radio Supernova Remnant (SNR) G338.3-0.0. This object is consistent with the position and flux previously measured by both ASCA and Swift-XRT but is now shown to be significantly extended. We argue that this object is very likely the counterpart to HESSJ1640-465 and that both objects may represent the Pulsar Wind Nebula of an as of yet undiscovered pulsar associated with G338.3-0.0.

gamma ray: cosmic radiation
X-ray: cosmic radiation
cosmic radiation: particle source
cosmic radiation: energy spectrum
pulsar
counters and detectors: satellite
experimental results

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