A dataset provided by the European Space Agency

Name: Classification of a New Type of X-ray Weak Quasar
Published: 2022-05-05T00:00:00Z

Proposal ID	086126
Title	Classification of a New Type of X-ray Weak Quasar
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0861260101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0861260301
DOI	https://doi.org/10.57780/esa-c6f071f
Principal Investigator, PI	Prof Bin Luo
Abstract	Luminous X-ray emission is an ubiquitous property of quasars. Small populationsof type 1 quasars have displayed weak X-ray emission, generally due toabsorption or variability effects. We have discovered several X-ray weak SDSSquasars that do not fit easily into any of the known categories. We propose toobtain 30-50 ks XMM-Newton observations for three of these exceptional X-rayweak quasars. We will determine reliably whether there is X-ray variability orX-ray absorption, and then classify the possible causes for their observed X-rayweakness. Understanding this new type of X-ray weak quasar might provide newinsights into the X-ray corona and its environment. It will also allow us toconstrain the missed fraction of SMBH growth in extragalactic X-ray surveys.
Publications	XMM-Newton Observations of Two Archival X-Ray Weak Type 1 Quasars: Obscuration Induced X-Ray Weakness and Variability \|Zhang, Zijian, Luo, Bin, et al. \| ApJ \| 954-159 \| 2023 \| 2023ApJ...954..159Z \| http://ui.adsabs.harvard.edu/#abs/2023ApJ...954..159Z 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	2021-01-25T04:39:38Z/2021-04-07T18:45:32Z
Version	19.16_20210326_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	2022-05-05T00:00:00Z
Keywords	"xray weak quasar", "variability effects", "xray weakness", "SDSS", "missed fraction", "fit easily", "XMM", "extragalactic xray surveys", "ubiquitous property", "luminous xray emission", "xray weak quasars", "xray absorption", "XMM-Newton", "xray corona", "xray variability", "xmm newton", "smbh growth"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Prof Bin Luo, 2022, 'Classification of a New Type of X-ray Weak Quasar', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-c6f071f