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

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ID# 2

4U 0513-40

XB 0512-401

Confirmed UCXB

RA                 Dec     [hh:mm:ss.ss]          [dd:mm:ss.ss] 05:14:06.40  -40:02:38                      [ICRS]

ℓ                      b [deg]                            [deg] 244.509804  -35.036749

Year of discovery: 1972

(Forman1976b)

Basic data

Location in Globular Cluster	NGC 1851
Type of accretor	NS	Persistent
Distance [kpc] (other distances)	11.951 +0.134-0.133	Baumgardt2021 Harris2010Kuulkers2003Watkins2015Galloway2020
z [kpc]	-6.89	Baumgardt2021
Orbital period (Porb) [min]	17	Zurek2009
Porb determination method	UV modulation
Thermonuclear X-ray burst	Short-B	Forman1976bGalloway2020
Peak X-ray flux [erg s-1 cm-2] (2 - 10 keV)	1.33E-10	Fiocchi2011
NH [x1022 cm-2]	0.026	Sidoli2001
E(B-V) [mag]	0.02±0.01	Harris2010
Magnitude	B=21.1	Deutsch1996
Proposed companion

NOTES

The orbital period is confirmed by detections in soft X-rays (Fiocchi2011). Fiocchi2011 suggested a high inclination angle of the binary system (> 80 deg). 4U 0513-40 shows large X-ray flux variations of more than a factor of 10 on time-scales of days to weeks (Maccarone2010).

Spectral data

UV
Optical
X-ray	Interstellar O absorption line (23.4 Å)	Juett2005

Peak Optical/NIR magnitudes

If the system is transient, quiescent magnitudes are indicated with a "q" superindex Deutsch1996
U=20.2, B=21.1

Aladin finding chart

Scroll to zoom. Set survey image in "Manage layers"
Default image: DSS2 Red

4U 0513-40 in Simbad

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References to finding charts

Zurek2009Homer2001Deutsch1996