Simultaneous H.E.S.S. and Chandra observations of Sgr A* during an X-ray flare

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dc.creatorHinton, Jim
dc.creatorVivier, Matthieu
dc.creatorBühler, Rolf
dc.creatorPühlhofer, Gerd
dc.creatorWagner, Stefan
dc.date2007-10-08
dc.date.accessioned2026-07-07T08:34:45Z
dc.date.available2026-07-07T08:34:45Z
dc.descriptionThe rapidly varying non-thermal X-ray emission observed from Sgr A* points to particle acceleration taking place close to the supermassive black hole. The TeV gamma-ray source HESS J1745-290 is coincident with Sgr A* and may be closely related to the X-ray emission. Simultaneous X-ray and TeV observations are required to elucidate the relationship between these two objects. Here we report on joint H.E.S.S./Chandra observations in July 2005, during which an X-ray flare was detected. Despite a factor >10 increase in the X-ray flux of Sgr A*, no evidence is found for an increase in the TeV gamma-ray flux. We find that an increase of the gamma-ray flux of a factor 2 or greater can be excluded at a confidence level of 99%. This finding disfavours scenarios in which the bulk of the gamma-ray emission observed is produced close to Sgr A*.
dc.description4 pages, 2 figures, Contribution to the 30th ICRC, Merida, Mexico, July 2007
dc.identifierhttps://arxiv.org/abs/0710.1537
dc.identifierhttp://arxiv.org/abs/0710.1537
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/139545
dc.subjectAstrophysics
dc.titleSimultaneous H.E.S.S. and Chandra observations of Sgr A* during an X-ray flare
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