A dataset provided by the European Space Agency

Name: Lineless Quasars at High Redshift: Extremely High Accretion Rate Sources
Published: 2009-08-02T00:00:00Z

Proposal ID	055175
Title	Lineless Quasars at High Redshift: Extremely High Accretion Rate Sources
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0551750301
DOI	https://doi.org/10.5270/esa-2zumjge
Principal Investigator, PI	Dr Ohad Shemmer
Abstract	We propose to obtain XMM-Newton spectroscopic imaging observations of aremarkable group of five quasars that lack detectable ultraviolet emission linesat z=2.9-4.0 with a total exposure time of 195 ks. Obtaining ~1000 photons persource, we will measure the hard-X-ray photon index and intrinsic absorption,and search for an iron line and Compton reflection. Steep hard-X-ray spectralslopes will indicate that high accretion rates may be responsible for theemission-line suppression with implications for the physics of the broad-lineregion. The XMM-Newton data may provide an important linkage between our sourcesand an apparently related group of radio-quiet, weak-lined active galacticnuclei at low redshift.
Publications	X-ray Emission from Optically Selected Radio-intermediate and Radio-loud Quasars \|Miller B. P. Brandt W. N. et al. \| ApJ \| 726-20 \| 2011 \| 2011ApJ...726...20M \| http://ui.adsabs.harvard.edu/#abs/2011ApJ...726...20M Weak Line Quasars at High Redshift: Extremely High Accretion Rates or Anemic Broad-line Regions? \|Shemmer Ohad Trakhtenbrot Benny et al. \| ApJ \| 722-152 \| 2010 \| 2010ApJ...722L.152S \| http://ui.adsabs.harvard.edu/#abs/2010ApJ...722L.152S Exospheric solar wind charge exchange as seen by XMM-Newton \|Carter J. A. Semba S. \| AN \| 333-313 \| 2012 \| 2012AN....333..313C \| http://ui.adsabs.harvard.edu/#abs/2012AN....333..313C The cosmological analysis of X-ray cluster surveys - II. Application of the CR-HR method to the XMM archive \|Clerc N. Sadibekova T. et al. \| MNRAS \| 423-3561 \| 2012 \| 2012MNRAS.423.3561C \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.3561C Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov V. N. \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y SPIDERS: the spectroscopic follow-up of X-ray selected clusters of galaxies in SDSS-IV \|Clerc N. Merloni A. et al. \| MNRAS \| 463-4490 \| 2016 \| 2016MNRAS.463.4490C \| http://ui.adsabs.harvard.edu/#abs/2016MNRAS.463.4490C 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 Dependence of the broad Fe Kalpha line on the physical parameters of AGN \|Liu Zhu Yuan Weimin et al. \| MNRAS \| 463-684 \| 2016 \| 2016MNRAS.463..684L \| http://ui.adsabs.harvard.edu/#abs/2016MNRAS.463..684L 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 Steep Hard-X-Ray Spectra Indicate Extremely High Accretion Rates in Weak Emission-line Quasars \|Marlar Andrea Shemmer Ohad et al. \| ApJ \| 865-92 \| 2018 \| 2018ApJ...865...92M \| http://ui.adsabs.harvard.edu/#abs/2018ApJ...865...92M X-ray properties of the X-CLASS-redMaPPer galaxy cluster sample: the luminosity-temperature relation \|Molham Mona Clerc Nicolas et al. \| MNRAS \| 494-161 \| 2020 \| 2020MNRAS.494..161M \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.494..161M 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 Multiwavelength classification of X-ray selected galaxy cluster candidates using convolutional neural networks \|Kosiba Matej Lieu Maggie et al. \| MNRAS \| 496-4141 \| 2020 \| 2020MNRAS.496.4141K \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.496.4141K SPIDERS: overview of the X-ray galaxy cluster follow-up and the final spectroscopic data release \|Clerc N. Kirkpatrick C. C. et al. \| MNRAS \| 497-3976 \| 2020 \| 2020MNRAS.497.3976C \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.497.3976C 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 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	2008-06-27T06:04:57Z/2008-06-27T16:11:03Z
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	2009-08-02T00:00:00Z
Last Update	2025-01-27
Keywords	"lineless quasars", "XMM-Newton", "broad line region", "total exposure time", "accretion rates", "compton reflection", "xmm newton data", "apparently related", "accretion rate sources", "iron line", "XMM", "emission line suppression", "radio quiet", "low redshift"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Ohad Shemmer, 2009, 'Lineless Quasars at High Redshift: Extremely High Accretion Rate Sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-2zumjge