Coordinates

RA: 17^h43^m54^s.843
DEC: -29^∘44'43''.035
Position-uncertainty [arcsec]: 1.004 × 10⁰
Galactic-longitude [deg]: 359.12
Galactic-latitude [deg]: -0.11
Coordinate-Reference

Binary System

Alternative Name: Great Annihilator
X-ray Type: BH,MQ
Mean Distance [kpc]: 8.0^[1]
Distance Range [kpc]: 7.0 - 9.0^[1]

Compact Object

Mean Mass[M_☉]: 4.7^[1]

Orbital Period [d]: 12.61^[1]


XMM-Newton flux [10^-12 erg cm^-2 s^-1]:9.62 - 317.76 (0.2-12.0 keV)
Chandra flux [10^-12 erg cm^-2 s^-1]:11.33 (~0.1-10.0 keV)
Swift/XRT flux [10^-12 erg cm^-2 s^-1]:14.92 - 259.5 (0.3-10.0 keV)
Swift/BAT flux [10^-12 erg cm^-2 s^-1]:1038.73 (14-195 keV)

Optical Counterpart

Counterpart: not identified

Comments

Superorbital period: 171.1 d