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

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ID# 43

SLX 1737-282

2E 1737.5-2817, AX J1740.7-2818

Candidate UCXB

RA                 Dec    

[hh:mm:ss.ss]          [dd:mm:ss.ss]

17:40:42.83    -28:18:08.4

                     [ICRS]

ℓ                      b

[deg]                            [deg]

359.973590  01.249106

Year of discovery: 1985

(Skinner1987)

Basic data
Location in Globular Cluster
Type of accretor NS Persistent
Distance [kpc]
(other distances)
 Gaia [kpc] 		3.9±0.3(H), 5.1±0.4(He)

4.5+2.1-4 		Galloway2020
Falanga2008IntZand2002Chelovekov2017Chelovekov2011
Arnason2021
z [kpc] 0.11 Galloway2020
Orbital period (Porb) [min]
Porb determination method
Thermonuclear X-ray burst
IB
IntZand2002Falanga2008
Peak X-ray flux [erg s-1 cm-2]
(2 - 10 keV)		 5.53E-11 ArmasPadilla2018
NH [x1022 cm-2] 1.9±0.1 ArmasPadilla2018IntZand2002
E(B-V) [mag]
Magnitude
Proposed companion He WD
(Thermonuclear bursts ) 		Falanga2008


NOTES
ArmasPadilla2018 constrain the orbital inclination of the system to <~65 deg.

Spectral data
UV
Optical
X-ray

Peak Optical/NIR magnitudes
If the system is transient, quiescent magnitudes are indicated with a "q" superindex
Aladin finding chart
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Default image: DSS2 Red
SLX 1737-282 in Simbad

Pan-STARRS1 finding chart

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PS1 Finding chart PS1 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: 09 May 2023.