Table 10: Summary of 2XMM catalogue characteristics.
Energy range (keV; set by EPIC cameras) 0.2-12.0
Observations total 3491
  pn data 2674
  MOS1 data 3384
  MOS2 data 3394
Time interval Feb. 2000-Mar. 2007
Detections total 246 897
  total $L\ge 10$ 201 275
  total sum flag 0 199 359
  point-like 226 060
  extended 20 837
  with products 38 320
Unique sources total 191 870
  point-like 173 066
  extended 18 804
Sky area (deg2 ) total a $\sim $560
  net MOS1/2 $\sim $355
  net pn $\sim $330
Median exposure time MOS1/2 $\sim $16 000 s
(per observation) pn $\sim $12 500 s
Flux limit (pn) at $\sim $10% sky 0.5-2.0 keV $\sim $2
coverage ( $10^{-15}~\rm\ erg\ cm^{-2}\ s^{-1}$ ) 2.0-12 keV $\sim $15
  4.5-12 keV $\sim $35
Flux limit (pn) at $\sim $90% sky 0.5-2.0 keV $\sim $10
coverage ( $10^{-15}~\rm\ erg\ cm^{-2}\ s^{-1}$ ) 2.0-12 keV $\sim $90
  4.5-12 keV $\sim $250
Astrometric accuracy (1$\sigma$) typical 1.5 $^{\prime\prime}$
  bestb 0.35 $^{\prime\prime}$
Photometric accuracy MOS1/2 comparison $\le$5%
  pn/MOS comparison $\le$10%

a Overlaps included; b limited by systematics.

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