A dataset provided by the European Space Agency

Name: X-ray time delays in NGC 6814
Published: 2017-05-11T22:00:00Z

Proposal ID	076462
Title	X-ray time delays in NGC 6814
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0764620101
DOI	https://doi.org/10.5270/esa-xuiap3j
Principal Investigator, PI	Dr Andrew Lobban
Abstract	When combined with high S/N spectroscopy, X-ray timing properties - inparticular, X-ray time lags - allow one to gain physical insights into accretionand reprocessing near black holes in unprecedented detail. Here, we propose onesuch study of NGC 6814 (130ks) - a rapidly variable AGN in which a recent Suzakuobservation revealed the presence of a strong hard lag with an intriguingenergy-dependence while interestingly displaying no evidence of strongreprocessing in its X-ray spectrum. By utilising the high sensitivity ofXMM-Newton we propose to perform a detailed spectral-timing study of NGC 6814,taking full advantage of the opportunity to test the hypotheses surrounding theproduction of X-ray time delays in an environment free from complex spectral components.
Publications	Eclipsing the X-Ray Emitting Region in the Active Galaxy NGC 6814 \|Gallo Luigi C. Gonzalez Adam G. \| ApJ \| 908-33 \| 2021 \| 2021ApJ...908L..33G \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...908L..33G 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 A Systematic Study of the Short-term X-Ray Variability of Seyfert Galaxies. I. Diversity of the X-Ray rms Spectra \|Hu Jingwei Jin Chichuan et al. \| ApJ \| 936-105 \| 2022 \| 2022ApJ...936..105H \| http://ui.adsabs.harvard.edu/#abs/2022ApJ...936..105H What can be learnt from a highly informative X-ray occultation event in NGC 6814? A marvellous absorber \|Kang Jia-Lai Wang Jun-Xian \| MNRAS \| 525-1941 \| 2023 \| 2023MNRAS.525.1941K \| http://ui.adsabs.harvard.edu/#abs/2023MNRAS.525.1941K A colourful analysis: Probing the eclipse of the black hole and central engine in NGC 6814 using X-ray colour-colour grids \|Pottie B. Gallo L. C. et al. \| MNRAS \| 525-3633 \| 2023 \| 2023MNRAS.525.3633P \| http://ui.adsabs.harvard.edu/#abs/2023MNRAS.525.3633P 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 New 511 keV Line Data Provide Strongest sub-GeV Dark Matter Constraints \|De la Torre Luque Pedro Balaji Shyam \| ApJ \| 973-L6 \| 2024 \| 2024ApJ...973L...6D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...973L...6D
Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2016-04-08T04:59:00Z/2016-04-09T17:27:20Z
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	2017-05-11T22:00:00Z
Last Update	2025-08-04
Keywords	"XMM", "XMM-Newton", "NGC 6814", "complex spectral components", "xray time delays", "ngc 6814", "variable agn", "intriguing energy", "hard lag", "xmm newton", "xray time lags", "ngc 6814 130", "xray spectrum", "interestingly displaying", "gain physical insights"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Andrew Lobban, 2017, 'X-ray time delays in NGC 6814', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-xuiap3j