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
Last Update	2025-01-27
Keywords	"smbh growth", "missed fraction", "extragalactic xray surveys", "SDSS", "xmm newton", "fit easily", "xray absorption", "xray weak quasar", "XMM-Newton", "xray corona", "xray weakness", "XMM", "ubiquitous property", "xray variability", "variability effects", "xray weak quasars", "luminous xray emission"
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