|Title||Extreme ULXs: super-Eddington accretors, or intermediate-mass black holes|
|Author||Dr Fabio Pintore|
|Description||Ultraluminous X-ray sources with luminosities up to 2e40 erg-s are now regarded as likely super-Eddington accretors powered by stellar mass black holes, and those above 1e41 erg-s may be good intermediate-mass black hole (IMBH) candidates. However, the few objects lying between these ranges have an uncertain nature, and remain poorly studied. Here, we propose a new deep observation of one such object located within 20 Mpc. We will use the high quality EPIC data to determine whether its spectrum shows the characteristic signatures of the ultraluminous state, indicative of super-Eddington accretion onto large stellar black holes, or whether it appears consistent with the hard power-law spectra and >10% fractional variability of an IMBH in the hard state.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2015-09-19T22:00:00Z, 074405, 17.56_20190403_1200. https://doi.org/10.5270/esa-9no2cm6|