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Table 1

Observations log.

Object Instrument ObsID Date Exposure time [ks] Offset[′′]a

Hen 2-87 XMM-Newton EPIC 0109480101 2002/06/03 53 10.402
0109480201 2002/08/26 55 10.402
0109480401 2003/01/21 48 10.403
NSV 25735 XMM-Newton EPIC 0401670201 2007/04/30 10 0.007
V2416 Sgr XMM-Newton EPIC 0099760201 2000/03/22 61 0.005
XMM-Newton OM 0099760201 2000/03/22 47 0.005
Hen 2-104 Chandra ACIS 2577 2002/04/08 20 0.022

Notes.

(a)

Offset from instrument aim point, which is obtained from HEASARC.

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