A dataset provided by the European Space Agency

Name: Monitoring of the extreme alpha_ox variations in the luminous NL QSO PHL 1092
Published: 2012-01-26T00:00:00Z

Proposal ID	065384
Title	Monitoring of the extreme alpha_ox variations in the luminous NL QSO PHL 1092
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0653840301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0653840401
DOI	https://doi.org/10.5270/esa-870fx7v
Principal Investigator, PI	Dr Giovanni Miniutti
Abstract	During a 2008 XMM-Newton observation the luminous Narrow-Line quasar PHL 1092showed a dramatic X-ray flux drop by a factor virgul200 with respect to previousX-ray observations, becoming one of the most extreme X-ray weak QSO (alpha_ox =-2.44), after being X-ray normal (alpha_ox = -1.56) only 4.5 years earlier.The aim of this proposal is to continue our UV and X-ray monitoring of thisextreme source with two 25 ks exposures (one for each visibility window, henceseparated by about 6 months) to unveil the timescale over which transitions fromX-ray weak to normal QSO states take place in this most extraordinary AGN.
Publications	Insights on the X-ray weak quasar phenomenon from XMM-Newton monitoring of PHL 1092 \|Miniutti, G., Brandt, W. N., et al. \| MNRAS \| 425-1718 \| 2012 \| 2012MNRAS.425.1718M \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.425.1718M 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 Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function \|Vagnetti, F., Middei, R., et al. \| A&A \| 593-55 \| 2016 \| 2016A&A...593A..55V \| http://ui.adsabs.harvard.edu/#abs/2016A&A...593A..55V 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 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 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	2010-07-07T21:51:15Z/2010-12-30T14:33:40Z
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	2012-01-26T00:00:00Z
Keywords	"normal qso", "XMM", "alpha_ox variations", "xray flux drop", "visibility window", "XMM-Newton", "2008 xmm newton", "xray weak", "extraordinary agn"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Giovanni Miniutti, 2012, 'Monitoring of the extreme alpha_ox variations in the luminous NL QSO PHL 1092', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-870fx7v