A dataset provided by the European Space Agency

Name: Testing for intrinsic absorption in X-ray hard comma moderately radio-loud comma z&gt;4 RLQs
Published: 2015-04-21T22:00:00Z

Proposal ID	072326
Title	Testing for intrinsic absorption in X-ray hard, moderately radio-loud, z>4 RLQs
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0723260101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0723260201
DOI	https://doi.org/10.5270/esa-qu8r6on
Principal Investigator, PI	Dr Brendan Miller
Abstract	We propose XMM-Newton/EPIC observations of J0741+2520 (35 ks) and J1639+4340 (24ks), two extremely optically luminous (Mi < -29) and moderately radio-loudquasars at high redshift (z>4). Exploratory Chandra snapshots show these objectshave larger hardness ratios than is typical for similar RLQs. We will obtainhigh-quality X-ray spectra to determine whether the spectral hardness is due toheavy intrinsic absorption or to an anomalously flat power law slope. The formeroutcome could indicate these are young quasars engaged in the process ofclearing absorbing material from near the nucleus, while the latter outcomewould require either a jet-dominated X-ray spectrum despite moderate radio-loudness or else modified disk/coronal accretion structure at high luminosity.
Publications	XMM-Newton publication statistics \|Ness, J.-U., Parmar, A. N., et al. \| AN \| 335-210 \| 2014 \| 2014AN....335..210N \| http://ui.adsabs.harvard.edu/#abs/2014AN....335..210N The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch, Eric W., \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F AGN spectral states from simultaneous UV and X-ray observations by XMM-Newton \|Svoboda, J., Guainazzi, M., \| A&A \| 603-127 \| 2017 \| 2017A&A...603A.127S \| http://ui.adsabs.harvard.edu/#abs/2017A&A...603A.127S A Comparison of X-Ray Photon Indices among the Narrow- and Broad-line Seyfert 1 Galaxies \|Ojha, Vineet, Chand, Hum, et al. \| ApJ \| 896-95 \| 2020 \| 2020ApJ...896...95O \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...896...95O Blazars at the Cosmic Dawn \|Paliya, Vaidehi S., Ajello, M., et al. \| ApJ \| 897-177 \| 2020 \| 2020ApJ...897..177P \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...897..177P The composite X-ray spectra of radio-loud and radio-quiet SDSS quasars \|Zhou, Min-Hua, Gu, Min-Feng, \| RAA \| 21-4 \| 2021 \| 2021RAA....21....4Z \| http://ui.adsabs.harvard.edu/#abs/2021RAA....21....4Z 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 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 From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque, Pedro, Balaji, Shyam, \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2013-08-02T21:41:47Z/2014-03-31T20:34:36Z
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	2015-04-21T22:00:00Z
Keywords	"exploratory chandra snapshots", "quality xray spectra", "larger hardness ratios", "moderate radio loudness", "clearing absorbing material", "XMM", "xray hard", "spectral hardness", "redshift z", "former outcome", "quasars engaged", "XMM-Newton", "coronal accretion structure", "EPIC", "optically luminous mi", "moderately radio loud", "xmm newton", "else modified disk"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Brendan Miller, 2015, 'Testing for intrinsic absorption in X-ray hard comma moderately radio-loud comma z>4 RLQs', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-qu8r6on