GRO J1750-27
Other Name: AX J1749.1-2639 SIMBAD
Monitoring data: RXTE/ASM (only available)
Coordinates
RA 17h 49' 12.00", DEC -26° 38' 50.0"
RA 276.3000deg, DEC -26.6194deg
l 2.3682, b +0.5080
Binary system
Distance: 18 kpc ([1])
Orbit
| Parameter | Value | Unit | Reference |
|---|---|---|---|
| Porb | 29.817(9) | days | [1] |
| tau | 49931.02(1) | MJD | [1] |
| a sin i | 101.8(5) | lt-s | [1] |
| e | 0.360(2) | [1] | |
| omega | 206.3(3) | deg | [1] |
Description
The Be transient GRO J1750-27 was discovered in 1995 during a major outburst [1]. The spin period of the neutron star of about 4.45 s was found to spin up during the outburst with a rate of 38 pHz/s, which is correlated to the luminosity.
The source appears to lie on the other side of the Galactic Centre and is very close on the celestial sphere to GX 3+1.
Spectrum
INTEGRAL observed the source during the second reported outburst in 2008. The spectrum could be modelled successfully with either a single cutoff powerlaw or thermal Comptonization. Additionally, the hardness decreased with time ([2]).
References