Table A.5.
Further details on cyclotron lines: centroid energy (from Table A.1), line width σ, central line depth D (the normalization constant of the line component, often called the “strength” of the line), “optical depth” τ of the line (with “strength” 
), X-ray luminosity Lx, References and additional notes.
| System | Ecyc | Width | “strength” | Optical | Lx | Ref.c | Notes |
|---|---|---|---|---|---|---|---|
| σ | (gabs) | depth | (1036 | “tbc” = to be confirmed | |||
| (keV) | (keV) | D | τ | ergs/s) | |||
| Cen X-3 | 30/28 | 7/8 | – | 1.1/0.8 | – | 128/186a | |
| ″ ″ ″ | 29 | 4/6 | 2.5 | 0.67,0.73 | 54 | 49,50 | |
| Cep X-4 | 30 | 5.8/4.9 | 20/16.6 | – | 1.4/5.5 | 48 | Lx dependent |
| ″ ″ ″ | 28/45 | 6–9/∼11 | – | – | 1.4 | 47 | |
| GX 301-2 | 42 | 8 | – | 0.5 | – | 128a | |
| ″ ″ ″ | 35 | 7.4/3.4 | – | 10.6/0.14 | 3.9/1.0 | 52/51 | |
| GX 304-1 | 56/60 | 10.1/9 | – | 0.9 | – | 55 | |
| ″ ″ ″ | 43–58 | 4–12 | – | 0.6–0.9 | 17–380 | 55 | Lx dependent |
| ″ ″ ″ | 50–59 | 5–11 | 8.1 | 0.7 | 2–16 | 24,54 | |
| Her X-1 | 40/42 | 6.4/6.5 | 9.5 | 0.66/0.74 | – | 128/186a | Lx dependent |
| ″ ″ ″ | 37 | ∼6 | – | 0.6–1.0 | 30 | 136,137 | super-orbit: 34.85 d |
| NGC 300 ULX1 | 13 | ∼3.5 | ∼5.5 | – | 100–3000 | 190 | tbc |
| SMC X-2 | 27 | 6.4–7.2 | – | 6–9 | 180–550 | 91 | tbc, Lx dependent |
| SXP 15.3 | 5–8 | – | – | 0.4 | 20–100 | 215 | tbc |
| Vela X-1 | 24/25 | 0.9/4.7 | – | 0.16/0.26 | – | 128/186a | Lx dependent |
| ″ ″ ″ | 26.5/53 | 3.5/7 | ∼15 | ∼0.4/– | – | 32 | |
| X Persei | 16.4/13.4 | 3.6/2.7 | – | 0.78/0.36 | – | 128/186a | |
| 0332+53 | 27/26 | 7.6/5.4 | – | 1.8/1.9 | 375/341 | 65/123 | Lx dependent |
| ″ ″ ″ | 27.5–30.5 | 5–7 | – | 18 | 9–160 | 99 | |
| ″ ″ ″ | 51/50 | 8.9/9.9 | – | 2.2/2.1 | 375/341 | 65/123 | |
| ″ ″ ″ | 74/72 | 4.5/10.1 | – | 3.3/1.3 | 375/341 | 65/123 | |
| 0440.9+4431 | 32 | 6(fix) | – | – | – | 17 | tbc |
| 0520.5-6932 | 31 | 5.9 | – | 0.6 | 370-400 | 31 | tbc |
| 0535+26 | 50 | ∼10 | ∼0.1/1.6 | 0.5 | –/0.2 | 12,73/127 | see also 75,94 |
| ″ ″ ″ | 44-50 | 9–11 | 3-13 | 6–49 | 74 | Lx dependent | |
| ″ ″ ″ | 110 | 10–15 | 1/1.6 | 73/126 | see also 74 | ||
| 0658-073 | 33 | ∼12 | – | 0.4 | – | 60 | same as MX 0656-072 |
| 1008-57 | 78 | ∼11 | – | – | 0.5–100 | 77, 78 | |
| 1118-616 | 55, 110? | ∼14 | 60 | – | 9 | 45 | |
| 1409-619 | 44 | 4(fix) | – | 16 + 14/−7 | 0.07 | 79 | tbc |
| 1538-52 | 21 | 2–3 | – | ∼0.5 | 3.5–9 | 8,80,81,216 | super-orbit: 14.92 d |
| 1553-542 | 23/27 | 10.8/6.44 | –/8.28 | – | 76 | 82 | tbc |
| 1626-67 | 39/38 | 6.6/4.3 | – | 2.1/1.4 | – | 128/186a | |
| ″ ″ ″ | ∼38 | ∼5 | – | ∼20 | 1.5–100 | 83 | |
| 1626.6-5156 | 10,18 | 0.6–1.3 | – | 0.1–0.3 | ∼30 | 15 | tbc, Lx dependent |
| 16393-4643 | 29 | 4 | – | 0.4 | – | 29 | tbc |
| 16493-4348 | 31 | 10 fixed | ∼0.6b | – | – | 30,96 | tbc, super-orbit: 20.07 d |
| 1744-28 | 4.3 | 1.2 | – | 0.12 | 100 | 186 | tbc, Bursting Pulsar |
| 17544-2619 | 17/33 | 3.0/6.6 | – | 0.53/0.9 | 0.04 | 22 | tbc |
| 18027-2016 | 24 | ∼5 | – | 0.2–0.5 | 3.1 | 142 | tbc |
| 18179-1621 | 21 | ?? | ?? | ?? | ?? | ?? | ?? |
| 1822-371 | 0.7 | 0.14 | – | 0.03 | 180–250 | 85 | tbc |
| ″ ″ ″ | 33 | ∼5 | – | – | – | 86 | |
| 1829-098 | 15 | 2.3 | – | 0.52 | ∼4.3 | 224 | assumed D = 10 kpc |
| 1907+09 | 18 | 1.6/1.9 | – | 0.26/0.26 | – | 128/186a | Lx dependent? |
| ″ ″ ″ | 40 | 3.06 | – | 2.3 | 186 | ||
| 19294+1816 | 43 | 5.4 | – | 1.2 | a few | 198 | tbc |
| 1946+274 | 35/39 | 4.8/9 | – | 0.25/1.1 | – | 128/186b | |
| 1947+300 | 12 | 2.5 | 0.36–0.48 | (0.07) | – | 88,98 | tbc |
Notes.
Using the systematic studies by RXTE: Coburn et al. (2002; Ref. 128) and BeppoSAX: Doroshenko (2017; Ref. 186);
using cyclabs for the description of the cyclotron line (see Sect. 3);
References: see Table A.1.
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