We would like to thank members of the MOS and pn hardware and software
teams, the XMM-Newton SOC at the European Space Astronomy Center
(ESAC), and other members of the EPIC Background Working Group for
their contributions which ranged from helping us to understand
instrument and software issues to the identification of filter-wheel
closed observations in the archive. Users of this package should be
aware of the informational web pages covering the background issues of
EPIC observations at:
http://xmm.esac.esa.int/external/xmm_sw_cal/background/index.shtml
and the EPIC Calibration Status document at:
http://xmm.esac.esa.int/external/xmm_sw_cal/calib/index.shtml.
