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Paper detail

Analysis of a State Changing Supersoft X-ray Source in M31

We report on observations of a luminous supersoft X-ray source (SSS) in M31, r1-25, that has exhibited spectral changes to harder X-ray states. We document these spectral changes. In addition, we show that they have important implications for modeling the source. Quasisoft states in a source that has been observed as an SSS represent a newly- discovered phenomenon. We show how such state changers could prove to be examples of unusual black hole or neutron star accretors. Future observations of this and other state changers can provide the information needed to determine the nature(s) of these intriguing new sources.

preprint2013arXivOpen access
Brandon PatelRosanne Di StefanoThomas NelsonFrancis A. PriminiJifeng LiuSarah Scoles
astro-ph.HE
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Brandon PatelRosanne Di StefanoThomas NelsonFrancis A. PriminiJifeng LiuSarah Scoles

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