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


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ID# 30

AX J1754.2-2754

Candidate UCXB

RA                 Dec    

[hh:mm:ss.ss]          [dd:mm:ss.ss]

17:54:14.5    -27:54:35.6

                     [ICRS]

ℓ                      b

[deg]                            [deg]

001.853974  -01.099765

Year of discovery: 1999

(Sakano2002)

Basic data
Location in Globular Cluster
Type of accretor NS Persistent (Quasi-persistent)
Distance [kpc]
(other distances)
 		6.6±0.3(H), 9.2±0.4(He)
Chelovekov2007
Chenevez2017Chelovekov2011Chelovekov2017
z [kpc] -0.18 Chelovekov2007
Orbital period (Porb) [min]
Porb determination method
Thermonuclear X-ray burst Short-B
IB 		Chelovekov2007
Chenevez2017
Peak X-ray flux [erg s-1 cm-2]
(2 - 10 keV)		 9.55E-12 ArmasPadilla2013b
NH [x1022 cm-2] 2.93±0.06 ArmasPadilla2013b
E(B-V) [mag]
Magnitude Ks=18.12±0.15 Shaw2017
Proposed companion


NOTES
Given its low X-ray luminosity, the status of the source can only be verified via pointed X-ray observations (Bahramian2022).
Every time the source was pointed at, it was detected, except for a Chandra observation in 2008 (Bassa2008).
Although its orbital period is unknown, this source is a candidate UCXB due to its low X-ray luminosity, the type I X-ray bursts, and its low absolute optical magnitude (Bassa2008).

Spectral data
UV
Optical
X-ray

Peak Optical/NIR magnitudes
If the system is transient, quiescent magnitudes are indicated with a "q" superindex
Bassa2008 Shaw2017 Zolotukhin2015
i > 23.5, Ks=18.12±0.15, J > 19.7, H > 18.7, K > 18
Aladin finding chart
Scroll to zoom. Set survey image in "Manage layers"
Default image: DSS2 Red
AX J1754.2-2754 in Simbad

Pan-STARRS1 finding chart

Click to enlarge in new tab/window

PS1 Finding chart PS1 Finding chart

References to finding charts

Chelovekov2007 Shaw2017


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.