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

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ID# 46

IGR J17285-2922

XTE J1728-295

Candidate UCXB

RA                 Dec     [hh:mm:ss.ss]          [dd:mm:ss.ss] 17:28:38.86    -29:21:44.0                      [ICRS]

ℓ                      b [deg]                            [deg] 357.651162  02.898254

Year of discovery: 2003

(Walter2004Barlow2005)

Basic data

Location in Globular Cluster
Type of accretor	--	Transient
Distance [kpc] (other distances)	assumed 8	Sidoli2011
z [kpc]	0.40	Sidoli2011
Orbital period (Porb) [min]
Porb determination method
Thermonuclear X-ray burst
Peak X-ray flux [erg s-1 cm-2] (2 - 10 keV)	1.04E-10	Stoop2021
NH [x1022 cm-2]	0.99±0.05	Stoop2021
E(B-V) [mag]
Magnitude	I=18.24	Stoop2021
Proposed companion

NOTES

Stoop2021 suggest a BH accretor due to its location in the Lopt-LX and LX-Gamma planes. Radio detection of 118 μJy (4.5Ghz) and 126 μJy (7.5GHz; Stoop2021). The ratio between the X-ray and radio luminosities is consistent with both NS and BH accretors. The shape of the X-ray light curve is consistent with predictions for systems with short orbital periods (Stoop2021).

Spectral data

UV
Optical	Featureless optical and NIR spectra	Stoop2021
X-ray	Negative residuals (<~1 keV)	Sidoli2011

Peak Optical/NIR magnitudes

If the system is transient, quiescent magnitudes are indicated with a "q" superindex Stoop2021 Russell2010c
I=18.24, R~19

Aladin finding chart

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IGR J17285-2922 in Simbad

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Pan-STARRS1 finding chart

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References to finding charts

Sidoli2011