| 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 |
| 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 |
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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 |
| Last Update | 2025-01-27 |
| Keywords | "ugc3973 spread", "galaxy ugc3973", "instrumental origin", "spectral variability", "pn instrument", "time periods", "XMM", "kev line", "radio quiet seyfert1" |
| 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 |