Barnard, R.; Kolb, U. and Osborne, J.P.
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|DOI (Digital Object Identifier) Link:||http://dx.doi.org/10.1051/0004-6361:20031513|
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Four XMM-Newton observations of the core of M 31, spaced at 6 month intervals, show that the brightest point X-ray source, RX J0042.6+4115, has a 0.4-10 keV luminosity of ~ 5x1038 erg s -1, and exhibits significant variability in intensity and X-ray spectrum over a time scale of ~100 s including hard flares; such behaviour is only observed in Z-sources and transient black hole binaries in our Galaxy. The lightcurves, X-ray spectra and hardness-intensity data from the four XMM-Newton observations all strongly suggest that it is a Z-source, bringing the total number of known Z-sources to nine.
|Item Type:||Journal Article|
|External Project Funding Details:||
|Extra Information:||Article published by EDP Sciences and available at http://www.edpsciences.org/aa or http://dx.doi.org/10.1051/0004-6361:20031513|
|Keywords:||X-rays; galaxies; M 31; binaries|
|Academic Unit/Department:||?? scie-phya ??
Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Users 6041 not found.|
|Date Deposited:||17 Jul 2006|
|Last Modified:||18 Feb 2012 10:33|
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