Hyperluminous (>10^47 erg/s) and overmassive (>>10^9 Msun) quasars at z>virgul4.5-5provide invaluable testbeds for supermassive black-hole (SMBH) formation models.Currently only three broad-line radio-quiet quasars are known with bolometricluminosities Lbol >1e+48 erg/s. Two of them have measured masses larger than10-billions Msun. The most luminous of them is the only one lacking (i) X-rayobservations and (ii) a measure of the SMBH mass (M_SMBH). We propose here jointXMM-Newton and VLT/X-SHOOTER observations of this quasar in order to shed lighton its nuclear X-ray properties, obtain a reliable measure of M_SMBH andestimate its radiative output in terms of the Eddington luminosity.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2019-10-24T16:49:37Z/2019-10-25T14:38:01Z
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 Luca Zappacosta, 2020, 'Unveiling the nuclear properties of the most luminous quasar in the Universe', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-wet6m21
