Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2687r&link_type=abstract
Chandra proposal ID #10620409
Physics
Scientific paper
Hyperluminous X-ray sources (HLXs) are the most luminous of all extra-nuclear X-ray sources in galaxies, with luminosities in excess of 10^41 erg/s. They are also exceedingly rare, with no more than a handful known, and constitute the best candidates amongst the ULX population to host IMBHs. Here, we propose 30-ks Chandra ACIS-S observations of two new candidate HLXs, discovered in the 2XMM serendipitous source catalogue. We will use a combination of the exquisite X-ray imaging of Chandra and X-ray variability data to determine whether the XMM-Newton detections are actually single accreting X-ray sources, and not e.g. an amalgamation of many fainter objects. We will also examine their X-ray spectra to place initial constraints on the accretion states of these extraordinary objects.
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