Proposal ID | 069376 |
Title | ULX P13 in NGC 7793: A super-Eddington accreting black hole |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0693760101 |
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 |
Last Update | 2025-01-27 |
Keywords | "ngc 7793 allowed", "eccentric orbit", "key signatures", "bulk motion", "tentatively assign", "NGC 7793", "b8i star", "ngc 7793", "swift xrt", "spectral properties", "super eddington accretion", "chandra spectrum", "redshifted iron line" |
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 |