We propose NuSTAR and XMM joint observations of two quasars at z=2.36 andz=3.37, with the main goal of measuring the high-energy cutoffs of their X-rayemission. Only recently the high S/N NuSTAR spectra allowed precise measurementsof these parameters for the brightest local AGN, finding cutoff energies above100virgulkeV. Here we demonstrate that the same estimates are possible also for thebrightest high-z quasars, if (and only if) the whole 0.5-80virgulkeV band isobserved. The scientific outcome is of great value: we will be able to testwhether the same physical conditions hold in quasars at luminosities > 100times higher than those probed so far in the nearby Universe. An importantadditional scientific goal will be the study of the X-ray absorption by the intervening IGM.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2017-01-15T07:03:10Z/2017-01-15T22:16:30Z
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 Guido Risaliti, 2018, 'MEASURING CORONAL PROPERTIES OF TWO HIGH REDSHIFT comma LUMINOUS QUASARS', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-q0l07ql
