BlackCAT A Catalog of Stellar-Mass Black Holes in X-ray Binaries

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ID# 16

GRS 1124-684

N Mus 1991 = GU Mus

( dellaValle1991a )

RA     [J2000]     DEC

[]          []

11:26:26.65  -68:40:32.83

ℓ                      b

[deg]                            [deg]

295.3006588  -07.07263349

Year of discovery: 1991  
( Lund1991 Makino1991 )

# of outbursts after discovery:

Basic data

Distance [kpc] 4.95+0.69-0.65 Wu2016
Distance to the plane (z) [kpc] -0.73±0.04 Wu2016
Orbital period (Porb) [h] 10.38252±2E-05 GonzalezHernandez2017
Peak X-ray flux [erg s-1 cm-2]
Outburst magnitude (AB) V∼13.5 dellaValle1991a
Quiescent magnitude (AB) i'=19.92±0.04 King1996a Shahbaz1997 Shahbaz2010
E(B-V) [mag] 0.3 dellaValle1991a

Dynamically confirmed BH


GRS 1124-684 (N Mus91): A period derivative has been measured ( GonzalezHernandesz2017 ).
Gandhi2019 obtained a distance of 2.71+3.82-1.38 kpc from Gaia DR2.

Dynamical parameters

Orbital period [h] 10.38252±2E-05 GonzalezHernandez2017
Star's spectral type K3 – 5V Orosz1996 Casares1997
Star's radial velocity amplitude (K2) [km/s] 407±3 Orosz1996 Wu2015
Mass function 'f(M1)' [M] 3.02±0.06 Orosz1996 Wu2015
BH mass (M1) [M] 11.0+2.1-1.4 Wu2016
Mass ratio (q=M2/M1) 0.079±0.007 Wu2015
Inclination angle (i) [deg] 43.2+2.1-2.7 Wu2016
Rot. broadening (v sini) [km/s] 85±3 Wu2015

Optical/NIR magnitudes

Mag. Outburst (AB)
Mag. Quiescent (AB)
King1996a Shahbaz1997 Shahbaz2010
u'=21.5±0.4 g'=20.65±0.05
J=19.05±0.02 H∼18.39 K (not AB)=17.08±0.01
Aladin finding chart
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GRS 1124-684 in Simbad

Finding charts

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Finding chart

This research has made use of NASA's Astrophysics Data System (ADS) and the SIMBAD database operated at CDS (Strasbourg, France)
Please acknowledge the use of this catalogue in any published work you derive from it.

Last modified: 27 August 2021.