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

« Previous object   Next object »

ID# 37

1A 1246-588

4U 1246-58

Candidate UCXB

RA                 Dec     [hh:mm:ss.ss]          [dd:mm:ss.ss] 12:49:39.36    -59:05:14.68                      [ICRS]

ℓ                      b [deg]                            [deg] 302.702563  03.783544

Year of discovery: 1976

(Seward1976b)

Basic data

Location in Globular Cluster
Type of accretor	NS	Persistent
Distance [kpc] (other distances) Gaia [kpc]	3.0±0.1 (H), 3.8±0.2 (He) 2.03+1.17-2.3 2.0+1.2-2.4	Galloway2020 IntZand2008 BailerJones2018 Arnason2021
z [kpc]	0.25	Galloway2020
Orbital period (Porb) [min]
Porb determination method
Thermonuclear X-ray burst	Short-B IB	Boller1997Piro1997 IntZand2008
Peak X-ray flux [erg s-1 cm-2] (2 - 10 keV)	9.10E-11	IntZand2008
NH [x1022 cm-2]	0.5	IntZand2008
E(B-V) [mag]
Magnitude	V=19.45	Bassa2006
Proposed companion

NOTES

1258-Hz high amplitude kilohertz QPO (Jonker2007a). Radio flux density < 21 μJy (5GHz), < 24 μJy (9GHz; VanDenEijnden2021).

Spectral data

UV
Optical	Featureless	IntZand2008
X-ray	O (~0.54 keV) and Ne (~0.87 keV) absorption K-edges, Fe (~0.7 keV) absorption L-edge	IntZand2008

Peak Optical/NIR magnitudes

If the system is transient, quiescent magnitudes are indicated with a "q" superindex Bassa2006
V=19.45

Aladin finding chart

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

1A 1246-588 in Simbad

---

References to finding charts

Bassa2006