Table 1.
Target list and relevant information.
| Source | Spectral | V-band | Pspin | Porb | e | Distance (kpc) | References |
|---|---|---|---|---|---|---|---|
| name | type | (mag) | (s) | (days) | Gaia DR3 | ||
| 4U 0115+63 | B0.2Ve | 15.4 | 3.6 | 24.3 | 0.34 |
|
[1a], [1b] |
| IGR J01363+6610 | B1IV-Ve | 13.3 | – | – | – | 5.6 ± 0.4 | [2a], [2b] |
| RX J0146.9+6121 | B1Ve | 11.3 | 1400 | 303? | – | 2.75 ± 0.15 | [3a], [3b] |
| IGR J01583+6713 | B2IVe | 14.4 | – | – | – |
|
[4a], [4b] |
| RX J0240.4+6112 | B0Ve | 10.8 | – | 26.5 | 0.54 | 2.50 ± 0.07 | [5a], [5b] |
| Swift J0243.6+6124 | O9.5Ve | 12.8 | 9.9 | 27.6 | 0.10 |
|
[6a], [6b] |
| V 0332+53 | O8–9Ve | 15.4 | 4.4 | 33.8 | 0.37 | 5.9 ± 0.4 | [7a], [7b] |
| RX J0440.9+4431 | B0.2Ve | 10.7 | 202.5 | 150 | – |
|
[8a], [8b] |
| 1A 0535+262 | O9.7IIIe | 9.2 | 105 | 111 | 0.47 | 1.77 ± 0.06 | [9a], [9b] |
| IGR J06074+2205 | B0.5Ve | 12.2 | 373.2 | 80? | – |
|
[10a], [10b] |
| MXB 0656–072 | O9.5Ve | 12.3 | 160.4 | 101.2 | 0.4? | 5.7 ± 0.5 | [11a], [11b] |
| XTE J1946+274 | B0-1V-IVe | 16.6 | 15.8 | 172 | 0.25 |
|
[12a], [12b] |
| KS 1947+300 | B0Ve | 14.5 | 18.7 | 40.4 | 0.03 |
|
[13a], [13b] |
| EXO 2030+375 | B0Ve | 19.5 | 41.8 | 46.02 | 0.41 |
|
[14a], [14b] |
| GRO J2058+42 | O9.5-B0IV-Ve | 14.9 | 192 | 110 | – |
|
[15a], [15b] |
| SAX J2103.5+4545 | B0Ve | 13.9 | 358.6 | 12.7 | 0.40 |
|
[16a], [16b] |
| IGR J21343+4738 | B1IVe | 14.1 | 320.3 | – | – |
|
[17] |
| Cep X–4 | B1-2Ve | 14.3 | 66.3 | – | – |
|
[18] |
| 4U 2206+54 | O9.5Ve | 9.8 | 5550 | 19.2 | 0.15 |
|
[19a], [19b] |
| SAX J2239.3+6116 | B0Ve | 14.4 | 1247 | 263 | – |
|
[20a], [20b] |
| IGR J22534+6243 | B1Ve | 15.3 | 46.7 | – | – |
|
[21] |
Notes. Distance from Bailer-Jones et al. (2021). [1a] Negueruela & Okazaki (2001); [1b] Raichur & Paul (2010); [2a] Reig et al. (2005b); [2b] Tomsick et al. (2011); [3a] Reig et al. (1997b); [3b] Sarty et al. (2009); [4a] Wang (2010); [4b] Kaur et al. (2008); [5a] Aragona et al. (2009); [5b] Zamanov et al. (2013); [6a] Wilson-Hodge et al. (2018); [6b] (Reig et al. 2020); [7a] Negueruela et al. (1999); [7b] Doroshenko et al. (2016); [8a] Reig et al. (2005a); [8b] Ferrigno et al. (2013); [9a] Haigh et al. (2004); [9b] Grundstrom et al. (2007); [10a] Reig et al. (2010); [10b] Chhotaray et al. (2024); [11a] Yan et al. (2012); [11b] Nespoli et al. (2012); [12a] Verrecchia et al. (2002); [12b] Marcu-Cheatham et al. (2015); [13a] Galloway et al. (2004); [13b] Liu et al. (2025); [14a] Parmar et al. (1989); [14b] Wilson et al. (2008); [15a] Wilson et al. (1998); [15b] Kızıloǧlu et al. (2007); [16a] Baykal et al. (2000); [16b] Reig et al. (2004); [17] Reig & Zezas (2014); [18] Bonnet-Bidaud & Mouchet (1998); [19a] Corbet et al. (2007); [19b] Blay et al. (2006); [20a] in’t Zand et al. (2001); [20b] Reig et al. (2017); [21] Esposito et al. (2013).
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