Computer Science
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..281p&link_type=abstract
XMM-Newton Proposal ID #02053401
Computer Science
Mkn 841, Xmm-Newton Proposal 02053401
Scientific paper
We propose to perform a continuous 75 ks XMM-Newton observation of the Seyfert Mkn 841 to elucidate the origin of its very peculiar iron line complex. An XMM observation done in 2001 has revealed a line which was unresolved by the EPIC-pn instrument, which then disappeared in an observation 12 hours later. There is no simple explanation for this behaviour. If the line is truly narrow and, e.g., originates from the torus, it should not be rapidly variable. If it is from the accretion disk, it should not be narrow. A long XMM observation will provide crucial information to fulfill the purpose of this proposal. It will permit 1) to obtain a high signal-to-noise line profile to search for any broad wings, and 2) to study the rapid line variability behaviour to better understand its origin.
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