GX 301-2

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Other names : 4U 1223-62 (Simbad)

Monitoring data: RXTE/ASM Swift/BAT MAXI Fermi/GBM pulsed flux Fermi/GBM occultation

Coordinates

RA 12h 26‘ 37.561“ DEC -62° 46‘ 13.16“

Binary system

Distance: 3 kpc ([1])

Orbit

697

Parameter Value Unit Reference
Porb 41.498(2) days [2]
T0 48802.79(12) MJD [2]
a sin i 368.3±3.7 lt-sec [2]
e 0.462±0.0.14 [2]
omega 310.3±1.4 deg [2]
i 60 deg [1]

Optical Companion

Names': Wray 977

Parameter Value Unit Reference
Mopt 39 - 68 M⊙ [1]
Ropt 62 R⊙ [1]
V 10.83 [1]
K 5.25 [1]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Kaper, L., van der Meer, A., and Najaroo, F., 2006, A&A, 457, 595 (NASA ADS)
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Koh, T.D., Bildsten, L, Chakrabarty, D., Nelson, R., et al., 1997, ApJ, 479, 933 (NASA ADS)
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