A dataset provided by the European Space Agency

Name 079082


DOI 10.5270/esa-q0l07ql
Author Dr Guido Risaliti
Description We propose NuSTAR and XMM joint observations of two quasars at z=2.36 and z=3.37, with the main goal of measuring the high-energy cutoffs of their X-ray emission. Only recently the high S-N NuSTAR spectra allowed precise measurements of these parameters for the brightest local AGN, finding cutoff energies above 100~keV. Here we demonstrate that the same estimates are possible also for the brightest high-z quasars, if (and only if) the whole 0.5-80~keV band is observed. The scientific outcome is of great value: we will be able to test whether the same physical conditions hold in quasars at luminosities > 100 times higher than those probed so far in the nearby Universe. An important additional scientific goal will be the study of the X-ray absorption by the intervening IGM.
Publication Bulk Comptonization: new hints from the luminous blazar 4C+25.05 . Kammoun, E. S., Nardini, E., et all. . MNRAS . 473-89 . 2018 . 2018MNRAS.473L..89K ,
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 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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2018-03-29T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2018-03-29T22:00:00Z, 079082, 17.56_20190403_1200. https://doi.org/10.5270/esa-q0l07ql