Please use this identifier to cite or link to this item:
Title: XMM-Newton observation of the brightest X-ray flare detected so far from Sgr A*
Authors: Porquet, D.
Predehl, P.
Aschenbach, B.
Grosso, N.
Goldwurm, A.
Goldoni, P.
Warwick, R. S.
Decourchelle, A.
First Published: 1-Aug-2003
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2003, 407 (1), pp. L17-L20
Abstract: We report the high S/N observation on October 3, 2002 with XMM-Newton of the brightest X-ray flare detected so far from Sgr A* with a duration shorter than one hour (~2.7 ks). The light curve is almost symmetrical with respect to the peak flare, and no significant difference between the soft and hard X-ray range is detected. The overall flare spectrum is well represented by an absorbed power-law with a soft photon spectral index of $\Gamma =2.5 \pm0.3$, and a peak 2-10 keV luminosity of 3.6 $^{+0.3}_{-0.4}\times 10 ^{35}$ erg s -1, i.e. a factor 160 higher than the Sgr A* quiescent value. No significant spectral change during the flare is observed. This X-ray flare is very different from other bright flares reported so far: it is much brighter and softer. The present accurate determination of the flare characteristics challenge the current interpretation of the physical processes occuring inside the very close environment of Sgr A* by bringing very strong constraints for the theoretical flare models.
DOI Link: 10.1051/0004-6361:20030983
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2003 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
aafe261.pdfPublished (publisher PDF)113 kBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.