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

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ID# 20

IGR J17494-3030

Swift J17494-3030

Confirmed UCXB

RA                 Dec     [hh:mm:ss.ss]          [dd:mm:ss.ss] 17:49:23.62  -30:29:59.0                      [ICRS]

ℓ                      b [deg]                            [deg] 359.086011  -01.510211

Year of discovery: 2012

(Boissay2012)

Basic data

Location in Globular Cluster
Type of accretor	NS AMXP (376.05 Hz / 2.66 ms)	Transient Ng2021
Distance [kpc] (other distances)	assumed 8	ArmasPadilla2013c
z [kpc]	-0.21	ArmasPadilla2013c
Orbital period (Porb) [min]	74.9445±0.0005	Ng2021
Porb determination method	X-ray pulsation
Thermonuclear X-ray burst
Peak X-ray flux [erg s-1 cm-2] (2 - 10 keV)	9.35E-11	ArmasPadilla2013c
NH [x1022 cm-2]	1.87	ArmasPadilla2013c
E(B-V) [mag]
Magnitude
Proposed companion	(likely to be a ~0.02solar mass finite-entropy He or C/O Wd) (donor mass-radius constraint)	Ng2021

NOTES

The radio counterpart was likely detected during the 2020 outburst (4.5 GHz; VanDenEijnden2020b). Rojas2012 identified five potential candidates for the quiescent NIR counterpart. The source was not detected in quiescence after the 2012 outburst with Chandra (Chakrabarty2013).

Spectral data

UV
Optical
X-ray	Featureless	ArmasPadilla2013c

Peak Optical/NIR magnitudes

If the system is transient, quiescent magnitudes are indicated with a "q" superindex

Aladin finding chart

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IGR J17494-3030 in Simbad

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Pan-STARRS1 finding chart

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