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Table 1:

Log of the XMM X-ray observations of HU Aqr.
Date Detector1 $T_{\rm Exp}$ Mean rate2
    (ks) (cts/s)
2002 May 16-17 PN-sw 36.4 1.11
  MOS1-sw 37.2 0.19
  MOS2-sw 37.2 0.26
2003 May 19 PN-ti 18.5 0.94
  MOS1-ti 20.2 0.21
  MOS2-ti 20.0 0.18
2003 Oct. 24-25 PN-sw 11.4 0.011
  MOS1-sw 11.6 -
  MOS2-sw 11.6 -
2005 May 16 PN-ti 18.6 -
  MOS1-sw 19.4 0.0025
  MOS2-sw 19.4 0.0022
1 The abbreviations after the PN/MOS detector indicate the instrument mode: sw = small window, ti = timing. 2 In the bright phase interval $\phi =
0.62{-}0.91$ and $\phi = 0.05{-}0.18$. Energy range used 0.18-10 keV and 0.3-10 keV for imaging and timing modes, respectively. Count rates have been corrected for the 65% encircled energy fraction corresponding to the aperture used.

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