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Table 1

Log of the observations.

Satellite Obs. Id Date Duration (ks) Notes

ROSAT rp50311n00 1993 September 12 6.7 PSPC
XMM-Newton 0152834501 2003 March 28 10.0 EPIC
Swift 00020057001 2007 October 19 10.4 XRT
Chandra 7617 2007 October 21–22 5.1 ACIS-S TE
Chandra 7616 2007 October 22 39.9 ACIS-S CC
Chandra 9609 2008 February 19 1.6 ACIS
Chandra 9610 2008 September 25 1.2 HRC-I, 12′ off-axis
Suzaku 406074010 2011 October 15–18 80 XIS
Swift 00044118001 2012 March 4 0.5 XRT

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