Table 1: XMM-Newton on-axis observation log of 4U 1850-087. Two observations were performed. The MOS1, MOS2 and pn cameras all used the medium thickness filter.

Obs.	Start time	End time	Inst.	Net Exp.	Mode
	(dy mon yr hr:mn)	(dy mon yr hr:mn)		(ks)
1	27 Sep. 2003 09:05	27 Sep. 2003 12:22	MOS1	11.7	Timing Fast Uncompressed
1	27 Sep. 2003 09:05	27 Sep. 2003 12:22	MOS2	11.5	Imaging Prime Partial Window
1	27 Sep. 2003 09:10	27 Sep. 2003 12:23	pn	8.1	Imaging Small Window
1	27 Sep. 2003 09:04	27 Sep. 2003 12:28	RGS1	12.1	Spectroscopy
1	27 Sep. 2003 09:04	27 Sep. 2003 12:28	RGS2	12.1	Spectroscopy
2	9 Oct. 2003 08:15	9 Oct. 2003 10:35	MOS1	8.3	Timing Fast Uncompressed
2	9 Oct. 2003 08:15	9 Oct. 2003 10:39	MOS2	8.4	Imaging Prime Partial Window
2	9 Oct. 2003 08:20	9 Oct. 2003 10:41	pn	5.9	Imaging Small Window
2	9 Oct. 2003 08:14	9 Oct. 2003 10:43	RGS1	8.8	Spectroscopy
2	9 Oct. 2003 08:14	9 Oct. 2003 10:43	RGS2	8.8	Spectroscopy