Weighing the ULX in M82 via QPO-Spectral Correlations from Simultaneous Chandra and XMM-Newton Observations

Details Weighing the ULX in M82 via QPO-Spectral Correlations from Simultaneous Chandra and XMM-Newton Observations Weighing the ULX in M82 via QPO-Spectral Correlations from Simultaneous Chandra and XMM-Newton Observations

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2561f&link_type=abstract

Chandra proposal ID #10400006

Computer Science

Scientific paper

The ultraluminous X-ray source (ULX) X41.4+60 in M82 is one of the best intermediate-mass black hole candidates. It shows luminosities 500 times the Eddington limit of a neutron star and quasi-periodic oscillations (QPOs) at frequencies lower than typical in stellar-mass black holes. It is the only ULX from which QPOs have been detected that is in a hard state and, thus, provides a unique opportunity to determine if the QPO frequency is correlated with spectral state as in stellar-mass black holes. We propose simultaneous Chandra and XMM observations to determine the relation between QPO frequency and spectral properties for X41.4+60. This may lead to constraints on the compact object mass.

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