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https://hdl.handle.net/2440/57834
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dc.contributor.author | Hayashi, S. | - |
dc.contributor.author | Kajino, F. | - |
dc.contributor.author | Naito, T. | - |
dc.contributor.author | Asahara, A. | - |
dc.contributor.author | Bicknell, G. | - |
dc.contributor.author | Clay, R. | - |
dc.contributor.author | Doi, Y. | - |
dc.contributor.author | Edwards, P. | - |
dc.contributor.author | Enomoto, R. | - |
dc.contributor.author | Gunji, S. | - |
dc.contributor.author | Hara, S. | - |
dc.contributor.author | Hara, T. | - |
dc.contributor.author | Hattori, T. | - |
dc.contributor.author | Itoh, C. | - |
dc.contributor.author | Kabuki, S. | - |
dc.contributor.author | Katagiri, H. | - |
dc.contributor.author | Kawachi, A. | - |
dc.contributor.author | Kifune, T. | - |
dc.contributor.author | Ksenofontov, L. | - |
dc.contributor.author | Kubo, H. | - |
dc.contributor.author | et al. | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Astroparticle Physics, 2009; 32(2):112-119 | - |
dc.identifier.issn | 0927-6505 | - |
dc.identifier.uri | http://hdl.handle.net/2440/57834 | - |
dc.description | Copyright © 2009 Elsevier B.V. All rights reserved. | - |
dc.description.abstract | SS433, located at the center of the supernova remnant W50, is a close proximity binary system consisting of a compact star and a normal star. Jets of material are directed outwards from the vicinity of the compact star symmetrically to the east and west. Non-thermal hard X-ray emission is detected from lobes lying on both sides. Shock accelerated electrons are expected to generate VHE gamma rays through the inverse-Compton process in the lobes. Observations of the western X-ray lobe region of SS433/W50 system have been performed to detect VHE gamma rays using the 10 m CANGAROO-II telescope in August and September, 2001, and July and September, 2002. The total observation times are 85.2 h for ON source, and 80.8 h for OFF source data. No significant excess of VHE gamma rays has been found at three regions of the western X-ray lobe of SS433/W50 system. We have derived 99% confidence level upper limits to the fluxes of gamma rays and have set constraints on the strengths of the magnetic fields assuming the synchrotron/inverse-Compton model for the wide energy range of photon spectrum from radio to TeV. The derived lower limits are 4.3 μG for the center of the brightest X-ray emission region and 6.3 μG for the far end from SS433 in the western X-ray lobe. In addition, we suggest that the spot-like X-ray emission may provide a major contribution to the hardest X-ray spectrum in the lobe. © 2009 Elsevier B.V. All rights reserved. | - |
dc.description.statementofresponsibility | Sei. Hayashi... R.W. Clay... J.R. Patterson, R.J. Protheroe... D.L. Swaby... G. Thornton... et al. | - |
dc.language.iso | en | - |
dc.publisher | Elsevier Science BV | - |
dc.source.uri | http://dx.doi.org/10.1016/j.astropartphys.2009.06.006 | - |
dc.subject | Gamma rays: observations | - |
dc.subject | ISM: individual (W50), jets | - |
dc.subject | Stars: individual (SS433) | - |
dc.title | Search for VHE gamma rays from SS433/W50 with the CANGAROO-II telescope | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.astropartphys.2009.06.006 | - |
dc.relation.grant | ARC | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/LE0238884 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP0345983 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Clay, R. [0000-0002-9040-9648] | - |
Appears in Collections: | Aurora harvest Physics publications |
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