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

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ID# 3

4U 1543-475

IL Lup

( Park2004 )

RA     [J2000]     DEC

[]          []

15:47:08.32  -47:40:10.80

ℓ                      b

[deg]                            [deg]

330.9178710  +05.42614694

Year of discovery: 1971  
( Giacconi1972 Matilsky1972 )

# of outbursts after discovery: 4

Basic data

Distance [kpc] 7.5±0.5 Jonker2004
Distance to the plane (z) [kpc] 0.7±0.05 Jonker2004
Orbital period (Porb) [h] 26.79377±0.00007 Orosz1998 Orosz2003
Peak X-ray flux [erg s-1 cm-2]
Outburst magnitude (AB) V=14.9 Pedersen1983a
Quiescent magnitude (AB) V=16.7 Orosz1998 Chevalier1992 Buxton2004
E(B-V) [mag] 0.5 Orosz1998

Dynamically confirmed BH


4U 1543-475 have shown outbursts in 1984, 1992, 2002 and 2021 ( Kitamoto1984 , Harmon1992a , Miller2002 , Negoro2021 ). The peak X-ray flux is taken from the 2002 outburst ( Park2004 ).
Gandhi2019 obtained a distance of 8.60+3.84-2.46 kpc from Gaia DR2.

Dynamical parameters

Orbital period [h] 26.79377±0.00007 Orosz1998 Orosz2003
Star's spectral type A2V Orosz1998
Star's radial velocity amplitude (K2) [km/s] 124±4 Orosz1998
Mass function 'f(M1)' [M] 0.25±0.01 Orosz1998 Orosz2003
BH mass (M1) [M] 8.4 – 10.4 Orosz1998 Orosz2003
Mass ratio (q=M2/M1) 0.25 – 0.31 Orosz1998 Orosz2003
Inclination angle (i) [deg] 20.7±1.5 Orosz1998 Orosz2003
Rot. broadening (v sini) [km/s] 46±2 Orosz1998 Orosz2003

Optical/NIR magnitudes

Mag. Outburst (AB)
Mag. Quiescent (AB)
Orosz1998 Chevalier1992 Buxton2004
B=17.3 V=16.7
Additional information
Light Curve by XB-NEWS ( Russell2019 )
Aladin finding chart
Scroll to zoom. Set survey image in "Manage layers"
Default image: DSS2 Red
4U 1543-475 in Simbad

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.