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     (ICRS)     DEC [hh:mm:ss.ss]          [dd:mm:ss.ss] 11:26:26.65  -68:40:32.83

ℓ                      b [deg]                            [deg] 295.3006588  -07.07263349

Year of discovery: 1991  
(Lund1991Makino1991)

# 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] [keV]	1.36E-07 [2-10]	Brandt1992
Outburst magnitude (AB)	V∼13.5	dellaValle1991a
Quiescent magnitude (AB)	i'=19.92±0.04	King1996aShahbaz1997Shahbaz2010
E(B-V) [mag]	0.3	dellaValle1991a

Dynamically confirmed BH

NOTES

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	Orosz1996Casares1997
Star's radial velocity amplitude (K2) [km/s]	407±3	Orosz1996Wu2015
Mass function 'f(M1)' [M☉]	3.02±0.06	Orosz1996Wu2015
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) dellaValle1991a
	V∼13.5
Mag. Quiescent (AB) King1996aShahbaz1997Shahbaz2010
u'=21.5±0.4		g'=20.65±0.05
		i'=19.92±0.04
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

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Finding charts

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