Table 6: Description of the automated (Flags 1-9) and manual (Flags 11-12) quality warning flags.
Flag Description Definition for flag to be set True (cf. Notes)
1 Low detector coverage $m_{\rm camera} < 0.5$
2 Near other source $r \le 65 \cdot \sqrt{R_{\rm epic}}$  AND $r_{\rm min} = 10\hbox{$^{\prime\prime}$ }$ AND $r_{\rm max} = 400\hbox{$^{\prime\prime}$ }$
3 Within extended emission $r \le 3 \cdot E$  AND $r_{\rm max} = 200\hbox{$^{\prime\prime}$ }$
4 Possible spurious extended detection near bright source Detection is extended AND Flag 2 is set AND $c_{\rm epic} \ge 1000$
5 Possible spurious extended detection within extended emission Detection is extended AND $r \le 160\hbox{$^{\prime\prime}$ }$ AND fraction of rate compared with originating source is $\le$0.4
6 Possible spurious extended detection due to unusual large single-band detection likelihood Detection is extended AND fraction of detection likelihood per camera and band compared with the sum of all is $\ge$0.9
7 Possible spurious extended detection At least one of the flags 4, 5, 6 is set
8 On bright MOS1 corner or bright low-gain pn column Source position is located on one of the affected pixels
9 Near bright MOS1 corner Source position within $ r_f = 60\hbox{$^{\prime\prime}$ }$ of a bright corner pixel
10 Not used  
11 Within region where spurious detections occur Set manually
12 Bright (``originating'') point source in region where spurious detections occur Set manually
Notes: m is the detector coverage of the detection weighted by the PSF; r is a radial distance in arcseconds from the ``originating'' source within which all detections receive this flag; $R_{\rm epic}$ is the EPIC source count rate in ct/s of the ``originating'' source; E is the extent parameter (core radius) of the ``originating source'' in arcseconds (cf. Sect. 4.4.4); $c_{\rm epic}$ is the EPIC source counts of the ``originating'' source; rf is the radius used for source PSF fitting in arcseconds.


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