GX 304-1
Revision as of 15:30, 18 April 2018 by Kuehnel (talk | contribs) (Created page with "Category:Accreting X-ray Pulsars '''Other names''' : 4U 1258-61 ([http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=gx+304-1&submit=SIMBAD+search SIMBAD]) '''Monitoring...")
Other names : 4U 1258-61 (SIMBAD)
Monitoring data: Swift/BAT MAXI Fermi/GBM pulsed flux Fermi/GBM occultation
Historical: RXTE/ASM
Coordinates
RA 13h 01‘ 17.10“ DEC -61° 36‘ 13.16“
Binary system
Distance: 2.4±05 kpc ([1])
Orbit
Early determination by [2]: Porb = 132.5d with other parameters unknown.
The MAXI team redetermined the period from X-ray activity as Porb = 132.2d (MAXI News)
[3] have determined the orbital ephemeris in detail, but with two separate solutions, depending on the assumed connection between spin changes and luminosity. Both solutions use as orbital period Porb = 132.189 ± 0.02d and find the eccentricity around 0.5.
Pulsations
Pulse period: 275.5s
X-ray Spectrum
Cyclotron Features
Optical Companion
Type : B2 Vne star ([6])
| Parameter | Value | Unit | Reference |
|---|---|---|---|
| B | 15.6 | SIMBAD | |
| V | 13.40 | SIMBAD |
References
- ↑ Parkes, G.E., Murdin, P.G., Mason, K.O., 1980, MNRAS, 190, 537 (NASA ADS)
- ↑ Priedhorsky, W.C., Terrell, J., 1983, ApJ 273, 709 (NASA ADS)
- ↑ Sugizaki, M., Yamamoto, T., Mihara, T., Nakajima, M., Makishima, K., 2015, PASJ 67(4), 73 (NASA ADS)
- ↑ Yamamoto,T., Sugizaki, M., Mihara, T., et al., 2011, arXiv, 1102.4232 (NASA ADS)
- ↑ Klochkov, Doroshenko, Santangelo, et al., 2012, A&A 542, L28 (NASA ADS)
- ↑ Mason, K.O., Murdin, P.G., Parkes, G.E., Visvanathan, N., 1978, MNRAS, 184, 45 (NASA ADS)