A dataset provided by the European Space Agency

Name: The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973
Published: 2008-04-20T00:00:00Z

Proposal ID	040007
Title	The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400070201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400070301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0400070401
DOI	https://doi.org/10.5270/esa-9himi2w
Principal Investigator, PI	Dr Luigi Gallo
Abstract	Two short exposures of the bright, radio-quiet Seyfert1.2 galaxy UGC3973 wereconducted with XMM as part of an AGN snap-shot survey. During one of theseobservations a narrow 8keV (rest frame) line-like emission feature was detectedwith the pn instrument. An instrumental origin was ruled out. The detection wasseriously scrutinised and found to be significant at 96.0-98.4% confidence,depending what a priori assumptions were made. We propose three, 20ksobservations (60ks total) of UGC3973 spread over AO5. The proposed programmewill allow investigation of the significance of the feature, its variability,and its origin. In addition, UGC3973 has demonstrated significant flux andspectral variability over similar time periods as proposed here. This will allow
Publications	An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy \|Levan, A. J., Tanvir, N. R., et al. \| Sci \| 333-199 \| 2011 \| 2011Sci...333..199L \| http://ui.adsabs.harvard.edu/#abs/2011Sci...333..199L Studying the X-ray/UV Variability of Active Galactic Nuclei with data from Swift and XMM archives \|Turriziani, Sara, \| JPhCS \| 280-12005 \| 2011 \| 2011JPhCS.280a2005T \| http://ui.adsabs.harvard.edu/#abs/2011JPhCS.280a2005T New constraints on the X-ray spectral properties of type 1 active galactic nuclei \|Scott, A. E., Stewart, G. C., et al. \| MNRAS \| 417-992 \| 2011 \| 2011MNRAS.417..992S \| http://ui.adsabs.harvard.edu/#abs/2011MNRAS.417..992S The XMM Cluster Survey: optical analysis methodology and the first data release \|Mehrtens, Nicola, Romer, A. Kathy, et al. \| MNRAS \| 423-1024 \| 2012 \| 2012MNRAS.423.1024M \| http://ui.adsabs.harvard.edu/#abs/2012MNRAS.423.1024M Evidence for ultra-fast outflows in radio-quiet AGNs. I. 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Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2006-09-30T10:22:01Z/2007-03-19T07:14:14Z
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	2008-04-20T00:00:00Z
Keywords	"radio quiet seyfert1", "XMM", "ugc3973 spread", "time periods", "kev line", "spectral variability", "pn instrument", "galaxy ugc3973", "instrumental origin"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Luigi Gallo, 2008, 'The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-9himi2w