title: List of X-ray pulsars
text: # List of X-ray pulsars
  
  This is a partial list of known accretion-powered pulsars, as of 1997.
  
  ## LMXB
  
  | Low-mass binaries | Spin period (sec) | Orbital period (days) | Companion (MK type) |
  | - | - | - | - |
  | GRO J1744-28 | 0.467 | 11.8 | unknown |
  | 4U 1626-67 | 7.66 | 0.0289 | KZ TrA (low-mass dwarf) |
  | 4U 1728-247 (GX 1+4) | 120 | unknown | V2116 Oph (M6 III) |
  
  ## IMXB
  
  | Intermediate-mass binaries | Spin period (sec) | Orbital period (days) | Companion (MK type) |
  | - | - | - | - |
  | Hercules X-1 (Her X-1) | 1.24 | 1.7 | HZ Her (A9-B) |
  
  ## HMXB
  
  | High-mass binaries | Spin period (sec) | Orbital period (days) | Companion (MK type) |
  | - | - | - | - |
  | SMC X-1 | 0.717 | 3.89 | Sk 160 (B0 I) |
  | Centaurus X-3 (Cen X-3) | 4.82 | 2.09 | V779 Cen (O6-8f) |
  | RX J0648.1-4419 | 13.2 | 1.54 | HD 49798 (O6p) |
  | LMC X-4 | 13.5 | 1.41 | Sk-Ph (O7 III-V) |
  | OAO 1657-415 | 37.7 | 10.4 | (Ofpe/WN9) |
  | Vela X-1 | 283 | 8.96 | HD 77581 (B0.5 Ib) |
  | 1E 1145.1-6141 | 297 | unknown | V830 Cen (B2 Iae) |
  | 4U 1907+09 | 438 | 8.38 | (B I) |
  | 4U 1538-52 | 530 | 3.73 | QV Nor (B0 Iab) |
  | GX 301-2 | 681 | 41.5 | Way 977BI.5 Ia) |
  
  ## BeXB
  
  | Transient Be star binary systems | Spin period (sec) | Orbital period (days) | Companion (MK type) |
  | - | - | - | - |
  | A0538-67 | 0.069 | 16.7 | (B2 III-IVe) |
  | 4U 0115+63 | 3.61 | 24.3 | V635 Cas (Be) |
  | V0332+53 | 4.37 | 34.2 | BQ Cam (Be) |
  | 2S 1417-624 | 17.6 | 42.1 | (OBe) |
  | EXO 2030+375 | 41.7 | 46.0 | (Be) |
  | GRO J1008-57 | 93.5 | ~248 | (Be) |
  | A0535+26 | 105 | 110 | HDE 245770 (09.7 IIe) |
  | GX 304-1 | 272 | 133(?) | V850 Cen (B2 Vne) |
  | 4U 1145-619 | 292 | 187 | Hen 715 (BI Vne) |
  | A1118-616 | 405 | unknown | He 3-640 (O9.5 III-Ve) |
  | 4U 0352+309 | 835 | unknown | X Per (O9 III-Ve) |
  | RX J0146.9+6121 | 1413 | unknown | LS I+61 235 (B5 IIIe) |
  | RX J0209.6-7427 | 9.28 | unknown | (Be) |
  