Interstellar medium composition through X-ray spectroscopy of low-mass X-ray binaries

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Table 4

Oxygen diagnostics: percentage contributions from the different phases and total column density.

Phases	4U1254–69	4U 1636–54	4U 1735–44	Aql X–1	GS 1826–24	GX 339–4	GX 9+9	SAX J1808.4	Ser X-1

O i (dust)^a	14	19	14	14	16	14	17	9	15
O i (gas)^a	80	72	78	82	78	77	78	57	75
O ii-v^a	5	7	6	3	5	7	5	17	9
O vi-viii^a	1	2	2	1	1	2	<1	17	1

O tot^b	2.10	2.59	2.79	3.31	2.93	4.53	1.66	1.37	3.72

Notes.

^(a)

Column ratios are expressed in percentage.

^(b)

Oxygen total column densities are in linear units of (10²² m^-2).

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