A dataset provided by the European Space Agency

Name: THE HIGH-ENERGY CUT-OFF IN HIGH-Z QSOS: A FIRST CUT
Published: 2019-01-12T23:00:00Z

Proposal ID	079564
Title	THE HIGH-ENERGY CUT-OFF IN HIGH-Z QSOS: A FIRST CUT
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0795640101
DOI	https://doi.org/10.5270/esa-dc2hedv
Principal Investigator, PI	Dr Giorgio Lanzuisi
Abstract	We propose NuSTAR observations of two among the X-ray brightest (F 0.5-10 > 510^-13 ergs s^-1 cm^-2, L 2-10 > 10^45 ergs s^-1) radio-quiet QSOs at z > 1.8,complemented by a joint, short XMM-Newton exposure for one of them. Our totaltime request is 250ks with NuSTAR and 30ks with XMM-Newton. By looking atrest-frame energies up to virgul 200-300 keV, our goal is to measure unambiguouslythe presence of spectral cut-offs at rest-frame energies as high as E c=500 keV.This is not possible for targets in the local Universe, where NuSTAR is justsensitive to E c < 250 keV. Our sample is unique and will allow unprecedentedmeasurements of E c in distant AGN with such X-ray luminosities. Our programwill prove for the first time whether there is a physical limit to the temperature of AGN.
Publications	NuSTAR Measurement of Coronal Temperature in Two Luminous, High-redshift Quasars \|Lanzuisi, G., Gilli, R., et al. \| ApJ \| 875-20 \| 2019 \| 2019ApJ...875L..20L \| http://ui.adsabs.harvard.edu/#abs/2019ApJ...875L..20L Classification of 4XMM-DR9 sources by machine learning \|Zhang, Yanxia, Zhao, Yongheng, \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies \|Cann, Jenna M., Weaver, Kimberly A., et al. \| ApJ \| 961-178 \| 2024 \| 2024ApJ...961..178C \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...961..178C The XMM-Newton Line Emission Analysis Program (X-LEAP). I. Emission-line Survey of O VII, O VIII, and Fe L-shell Transitions \|Pan, Zeyang, Qu, Zhijie, et al. \| ApJS \| 271-62 \| 2024 \| 2024ApJS..271...62P \| http://ui.adsabs.harvard.edu/#abs/2024ApJS..271...62P
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2017-12-29T06:48:16Z/2017-12-29T17:21:36Z
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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2019-01-12T23:00:00Z
Keywords	"NuSTAR", "physical limit", "XMM", "xray brightest", "local universe", "energy cut", "xray luminosities", "z qsos", "rest frame energies", "XMM-Newton", "total time", "spectral cut offs", "distant agn", "radio quiet qsos", "xmm newton"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Giorgio Lanzuisi, 2019, 'THE HIGH-ENERGY CUT-OFF IN HIGH-Z QSOS: A FIRST CUT', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dc2hedv