Table 1
XMM-Newton RGS observation log.
| Source | Obs. ID | Exposure time (ks) | Distance (kpc) | Galactic coordinates (l, b) | NH | E(B − V) |  |
|---|---|---|---|---|---|---|---|
| Cygnus X-2 | 0303280101 | 32 | 8−11(a) | (87.3,−11.3) | 1.9 | 0.4 ± 0.07(1) | 2.3 ± 0.4 |
| 0561180501 | 24 | ||||||
| 0694860301 | 36 | ||||||
| GX9+9 | 0090340101 | 11 | 5−7(b) | (8.5,9) | 1.9 | 0.1−0.4(2) | 0.6−2.3 |
| 0090340601 | 22 | ||||||
| 0084020401 | 22 | ||||||
| Ser X-1 | 0084020501 | 22 | 7.7 ± 0.9(c) | (36.1,4.8) | 4.4 | 0.4−1.5(3) | 2.3−8.7 |
| 0084020601 | 22 | ||||||
| SWIFT J1910.2-0546 | 0691271401 | 28 | 6(d) | (29.9,−6.8) | 2.24 | – | – |
| XTE J1817-330 | 0311590501 | 20 | 1−4(e) | (359.8,−8) | 1.5 | 0.1−0.5(4) | 0.6−3 |
Notes. The symbol NH represents the hydrogen column density in 1021 cm−2 from HI4PI Collaboration (2016), and 
is the column density in 1021 cm−2 estimated from the reddening values E(B − V) taken from:(1) McClintock et al. (1984),(2) Shahbaz et al. (1996),(3) Thorstensen et al. (1980),(4) Torres et al. (2006). Distances are from: (a) Cowley et al. (1979) & Smale (1998), (b) Christian & Swank (1997) & Vilhu et al. (2007), (c) Galloway et al. (2008), (d) Reis et al. (2013), (e) Sala & Greiner (2006). To convert from E(B − V) to NH we used the conversion NH/E(B − V) = 5.8 × 1021 H cm−2 mag−1 (Draine 2011).
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