A dataset provided by the European Space Agency

Proposal ID 069376
Title ULX P13 in NGC 7793: A super-Eddington accreting black hole
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DOI https://doi.org/10.5270/esa-be3i4ot
Principal Investigator, PI Dr Christian Motch
Abstract Optical observations of P13 in NGC 7793 allowed us to determine for the firsttime the mass of the black hole in an ULX, clearly indicating super-Eddingtonaccretion. The donor is a B8I star in an eccentric orbit. Swift XRT monitoringrevealed a likely eclipse as well as an extended faint state. Our serendipitousfaint state Chandra spectrum shows evidence of redshifted iron line which wetentatively assign to a jet. We propose to obtain high S/N spectra of thebright, faint and eclipse states. Spectral properties of the bright state willdefine the key signatures of super-critical accretion. Eclipse observation willallow us to constrain the orbit and to possibly reveal evidence of bulk motion.Faint state observations will likely provide the first direct detection of a jet in an ULX.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2012-05-14T03:27:02Z/2013-11-25T18:01:24Z
Version PPS_NOT_AVAILABLE
Mission Description The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2014-12-05T23:00:00Z
Keywords "chandra spectrum", "key signatures", "bulk motion", "tentatively assign", "eccentric orbit", "ngc 7793", "super eddington accretion", "redshifted iron line", "swift xrt", "ngc 7793 allowed", "spectral properties", "b8i star", "NGC 7793"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Christian Motch, 2014, 'ULX P13 in NGC 7793: A super-Eddington accreting black hole', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-be3i4ot