Sampling ULX spectral states with XMM Newton and NuSTAR
Abstract
Recently our understanding of Ultraluminous X-ray Sources (ULX) has advanced significantly due to broad band spectro-temporal studies with XMM Newton, Suzaku and NuSTAR. Evidence now suggests that many ULXs with LX 1040ergs 1 are powered by super-Eddington accretion onto black holes with masses up to 100 Mo. This extreme accretion regime remains poorly understood. Observations show that ULXs are variable on timescales of weeks and exhibit distinct spectral states characterized by multiple components in the 0.3 30 keV band. To understand these components we propose to trigger a NuSTAR and XMM Newton observation of one of the bright ULXs in our sample in a different spectral state than previously observed.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2013
- Bibcode:
- 2013xmm..prop...85B
- Keywords:
-
- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- NGC 1313;
- IC 342