A quest for aperiodic variability and spectral curvature in the NGC 4559 ULXs

Details A quest for aperiodic variability and spectral curvature in the NGC 4559 ULXs A quest for aperiodic variability and spectral curvature in the NGC 4559 ULXs

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...63z&link_type=abstract

XMM-Newton Proposal ID #06517307

Statistics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ngc4559X-7, Ngc4559X-7, Ngc4559X-7, Ngc4559X-7, Ngc4559X-7, Ngc4559X-7, Ngc4559X-7

Scientific paper

We propose to perform a 100 ks observation of NGC 4559 with XMM-Newton in order to unambiguously establish if intrinsic variability is present in the power density spectrum of the ultraluminous X-ray source NGC 4559 X-7. The discovery of a QPO or a break would provide for the first time for this ULX a characteristic frequency of variability and would allow us to obtain an independent estimate of the BH mass. A 100 ks observation would allow us also to obtain a spectrum with unprecedented counting statistics that will prove if this ULX contains a cool, optically thick corona. A similar analyis will be performed also on the other bright ULX hosted in NGC 4559 (source X-10).

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