The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973

Details The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973 The 8 keV line in the X-ray bright Seyfert galaxy UGC 3973

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop....4g&link_type=abstract

XMM-Newton Proposal ID #04000701

Physics

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, Ugc 3973, Xmm-Newton Proposal 04000701

Scientific paper

Two short exposures of the bright, radio-quiet Seyfert1.2 galaxy UGC3973 were conducted with XMM as part of an AGN snap-shot survey. During one of these observations a narrow 8keV (rest frame) line-like emission feature was detected with the pn instrument. An instrumental origin was ruled out. The detection was seriously scrutinised and found to be significant at 96.0-98.4% confidence, depending what a priori assumptions were made. We propose three, 20ks observations (60ks total) of UGC3973 spread over AO5. The proposed programme will allow investigation of the significance of the feature, its variability, and its origin. In addition, UGC3973 has demonstrated significant flux and spectral variability over similar time periods as proposed here. This will allow

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