We found in 2009 a strong virgul10^4 Msun IMBH candidate, the hyper luminous X-raysource HLX-1 in the outskirts of the ESO 243-49 galaxy. We proposed that theIMBH is fed by mass transfer episodes when a WD donor passes at periapsis and istidally stripped, leading to X-ray outbursts. We detected in previous XMMobservations of HLX-1 faint unresolved X-ray lines at 0.64, 0.88 & 0.98keV. Wepropose that they may be due to photo-ionization of nearby material by thecentral source. We request a 130ks XMM ToO to detect with a high significancesoft X-ray lines when the source will be near its emission peak. Modeling of theRGS data with photo-ionization codes will help us put constraints on thephysical and dynamical properties of the emitting material around the BH.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-05-17T23:02:18Z/2017-05-19T11:18:58Z
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.
European Space Agency, Dr olivier godet, 2018, 'Constraining the nature of the companion star of the IMBH HLX-1', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-b4qrm95
