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Table 2

Source count-rate as a function of background filtering cut-offs in the 0.2 − 2.0 keV band.

PN

Cut-offs src bga GTI Net count-rate
(cnts) (cnts) (ks) (10-3 cnts s-1)

Default 13 ± 4 4 ± 1 2.7 3.24 ± 1.35
2.5 × 62 ± 8 29 ± 1 10.0 3.33 ± 0.80
none 140 ± 12 88 ± 2 16.1 3.23 ± 0.75

MOS1+MOS2b

Default 40 ± 6 12 ± 3 12.8 2.2 ± 0.6
2.5 × 66 ± 8 27 ± 5 17.0 2.3 ± 0.6
none 71 ± 8 31 ± 6 17.7 2.3 ± 0.6

Notes.

(a)

Background counts scaled to the size of source region.

(b)

For the MOS, the counts measured by the two MOS instruments have been summed. Therefore, the net count-rate also refers to MOS1+MOS2.

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