XMM-Newton Proposal 03057801

Details XMM-Newton Proposal 03057801 XMM-Newton Proposal 03057801

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004xmm..prop..186m&link_type=abstract

XMM-Newton Proposal ID #03057801

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Groups Of Galaxies, Clusters Of Galaxies, Supercluster, Perseus Cluster, Xmm-Newton Proposal 03057801

Scientific paper

Unbeknownst to most but not all the EPIC MOS detectors can be used to detect subsonic gas motions in cluster cores. From our work on calibration data we find that the relative energy across the EPIC MOS detectors can be reconstructed with a precision better than sim 1.5 eV. This can be used to detect velocities in excess of sim 70 km/s in cluster cores from the Fe Kalpha line. From the analysis of a public Perseus observation we find various indications of gas motions with typical velocities of the order of a few 100 km/s. Our analysis of the Perseus motions is however limited by the statistics of the observation, we therefore request a new, longer, Perseus observation to secure sufficient counts to measure velocity shifts down to sim 200 km/s.

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