UltraCompCAT A Catalogue of Ultra-Compact and Short Orbital Period X-ray Binaries

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ID# 4

4U 1543-624

2S 1543-624

Confirmed UCXB

RA                 Dec     [hh:mm:ss.ss]          [dd:mm:ss.ss] 15:47:54.69  -62:34:05.4                      [ICRS]

ℓ                      b [deg]                            [deg] 321.756967  -06.336329

Year of discovery: 1972

(Giacconi1972)

Basic data

Location in Globular Cluster
Type of accretor	NS	Persistent
Distance [kpc] (other distances) Gaia [kpc]	9.2±2.3 (He) 3.3-1.4+6.5	Serino2018 Wang2004 BailerJones2018
z [kpc]	-1.02	Serino2018
Orbital period (Porb) [min]	18.2±0.1	Wang2004
Porb determination method	Optical modulation
Thermonuclear X-ray burst	Short-B	Serino2018
Peak X-ray flux [erg s-1 cm-2] (2 - 10 keV)	7.27E-10	Juett2003b
NH [x1022 cm-2]	0.35	Juett2003b
E(B-V) [mag]
Magnitude	r' = 20.42±0.03	Wang2004
Proposed companion	CO WD; ONe WD (Optical spectrum; X-ray spectral modelling)	Nelemans2004 Juett2001

NOTES

Radio luminosity < 7.2E27 erg/s (5GHz; Tetarenko2018). Radio flux < 6 mJy (2 cm; Duldig1979).

Spectral data

UV
Optical	Shallow CO emission lines	Nelemans2004
X-ray	Ne/O (0.7 keV) Fe Kα (6.4 keV)	Juett2003b Farinelli2003Madej2011

Peak Optical/NIR magnitudes

If the system is transient, quiescent magnitudes are indicated with a "q" superindex McClintock1978 Wang2004
B~20, r' = 20.42±0.03

Aladin finding chart

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Default image: DSS2 Red

4U 1543-624 in Simbad

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References to finding charts

Wang2004