1RXS J004704.8-204743: A ULX in the Thermal Dominant State

Details 1RXS J004704.8-204743: A ULX in the Thermal Dominant State 1RXS J004704.8-204743: A ULX in the Thermal Dominant State

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...23f&link_type=abstract

XMM-Newton Proposal ID #06010101

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ngc 247 Ulx

Scientific paper

The thermal dominant state is the best understood emission state in black hole binaries, but is rarely found in ULXs. Identification of ULXs in the thermal dominant state would allow us to compare them with Galactic black holes directly and place constraints on their masses. A previous XMM observation of NGC 247 revealed that 1RXS J004704.8-204743 was possibly in the thermal dominant state. However, that observation was short and highly contaminated by background flares. We request a 28 ks EPIC observation to obtain a high quality spectrum of the source, in order to determine whether or not the source is in the thermal dominant state and derive its properties from spectral fitting.

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