A dataset provided by the European Space Agency

Name: Deciphering the Remarkable X-ray Spectrum of the Weak-Line Quasar SDSSJ1521+5202
Published: 2021-01-20T23:00:00Z

Proposal ID	084044
Title	Deciphering the Remarkable X-ray Spectrum of the Weak-Line Quasar SDSSJ1521+5202
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0840440101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0840440201
DOI	https://doi.org/10.57780/esa-z67h4zr
Principal Investigator, PI	Prof William Brandt
Abstract	Recent investigations of weak-line quasars (WLQs) have led us to propose asimple model where a thick inner accretion disk, associated with an extremelyhigh Eddington ratio, is responsible for both their weak lines and remarkableX-ray properties. We propose to test this model with a long observation of theoptically ultraluminous WLQ SDSS J1521+5202. Our Chandra data show this sourcehas a strikingly hard X-ray spectrum suggesting heavy absorption. The proposedhigh-quality XMM-Newton spectrum will determine if we are seeing the model.spredicted Compton-reflection dominated continuum due to Compton-thick absorptionby the inner disk. If confirmed, our model will help establish relationshipsbetween inner accretion-disk properties and the accretion rate in all quasars.
Publications	Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties \|Ni, Q., Brandt, W. N., et al. \| MNRAS \| 511-5251 \| 2022 \| 2022MNRAS.511.5251N \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.511.5251N 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
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2019-07-26T16:26:45Z/2019-12-16T04:45:41Z
Version	18.00_20191217_1110
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	2021-01-20T23:00:00Z
Keywords	"eddington ratio", "xray properties", "SDSS", "weak lines", "accretion rate", "XMM", "simple model", "xray spectrum", "chandra data", "XMM-Newton", "inner disk", "compton thick absorption", "heavy absorption"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof William Brandt, 2021, 'Deciphering the Remarkable X-ray Spectrum of the Weak-Line Quasar SDSSJ1521+5202', 18.00_20191217_1110, European Space Agency, https://doi.org/10.57780/esa-z67h4zr