A dataset provided by the European Space Agency

Proposal ID 060167
Title Hyperluminous X-ray Sources
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0601670101

DOI https://doi.org/10.5270/esa-gtn4lbz
Principal Investigator, PI Dr Timothy Roberts
Abstract It is now thought that most ultraluminous X-ray sources harbour stellar remnant(up to 100 M(sun)) black holes undergoing extreme accretion. However, this doesnot preclude some ULXs being powered by larger intermediate-mass black holes.Perhaps the best candidates are the rare hyperluminous X-ray sources, the mostluminous of ULXs with L(x) above 10^41 erg/s. Here we propose XMM-Newtonobservations of two HLXs found as serendipitous sources in the 2XMM catalogue.We will determine whether their characteristics are similar to other ULXs, e.g.showing a spectral break at a few keV, implying they are small black holesaccreting at extreme rates, or whether they instead appear like IMBHs accretingin a sub-Eddington (high or very high) state.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2009-06-27T06:13:20Z/2009-06-27T22:33:36Z
Version 17.56_20190403_1200
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 2010-07-15T00:00:00Z
Last Update 2025-08-04
Keywords "XMM", "XMM-Newton", "stellar remnant", "imbhs accreting", "2xmm catalogue", "hyperluminous xray sources", "blackhole accreting", "ultraluminous xray sources", "xmm newton", "spectral break", "sub eddington", "msun blackhole"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Timothy Roberts, 2010, 'Hyperluminous X-ray Sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gtn4lbz