4U 1708-40
Coordinates
RA: 17
h
12
m
023
s
.86
DEC: -40
∘
50'0034''.2
Position-uncertainty [arcsec]: 3.000 × 10
-1
Galactic-longitude [deg]: 346.33
Galactic-latitude [deg]: -0.93
Coordinate-Reference
Binary System
X-ray Type: XB
Mean Distance [kpc]: 8.0
[1]
[1]
Hydrogen Column density [10
22
cm
−2
]: 2.9
[1]
G-band Absorption [mag]: 10.1
[1]
Compact Object
Mass[M
☉
]: 1.4
soft energy band: 2.0-10.0 keV
soft-band flux [10
-12
erg cm
-2
s
-1
]:35.28 - 167.56
soft X-ray variability: 4.75
hard energy band: 20.0-60.0 keV
Optical Counterpart
J [mag]: 18.84(0.18)
[1]
H [mag]: 17.29(0.09)
[1]
K [mag]: 16.67(0.09)
[1]