New Online Database of Symbiotic Variables: 2XMM J174445.4-295046

Constellation
Sagittarius

Equatorial coordinates
α = 17 44 45.415
δ = -29 50 44.640

Galactic coordinates
l = 359.1260°
b = -0.3142°

Suspected	2009^Ref
Confirmed	2014^Ref
Symbiotic IR type	S^Ref
Hot component type	accreting-only^Ref
Outbursts	-

Identifiers

2XMM J174445.4-295046	IRAS -	GSC2.4.2 S8DN084416	AAVSO -
SIMBAD 2MASS J17444541-2950446	Pan-STARRS -	SAO -	VSX -
GAIA DR3 -	SkyMapper -	WRAY -	GCVS -
2MASS J17444541-2950446	HIP -	Hen -	BD -
WISE J174445.41-295044.4	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	XMMUJ174445.5-295044 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	266.1892^Ref	Parallax (mas)	-	Reddening E(B-V) (mag)	21.41±4.44^Ref ^{, Note}
Declination (°)	-29.8457^Ref	Distance (kpc)	3.1^Ref -^{, Note}
Galactic longitude (°)	359.1260^Ref	Proper motion in α (mas/yr)	-
Galactic latitude (°)	-0.3142^Ref	Proper motion in δ (mas/yr)	-

Observations

X-Ray	Yes^Ref	IR type	S^Ref	Radio	-
X-Ray type	γ^Ref	J (mag)	14.89^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	11.62^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	10.17^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	9.35^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	9.18^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	8.13^Ref	IPmax (eV)	-
B (mag)	-	WISE W4 (mag)	5.73^Ref	[O III] lines	-
V (mag)	-	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	-	IRAS 100μm (Jy)	-
G (mag)	-	AKARI S09 (Jy)	-
RP (mag)	-	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-	Size of giant’s orbit (AU)	-
Eccentricity	-	RV of giant (km/h)	-	Separation (AU)	-
Inclination (°)	-	Inferior conj. of giant (JD)	-	Mass function	-
Eclipses	-			Mass ratio	-
Orbital ephemeris	-

Cool component

Spectral type	M2 III^Ref	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	3700^Ref	Radius (R_⊙)	-	Type	-
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	NS/BH^Ref	Mass (M_⊙)	-	Spin period (min)	-
Shell-burning/Accreting-only	accreting-only^Ref	Radius (R_⊙)	-	Accretion disk	-
Eff. temperature (K)	-	Luminosity (L_⊙)	-
Lower limit (K)	-
Upper limit (K)	-

Links

SIMBAD CDS Portal

Notes

Suspected by Heinke et al. (2009), this star is considered a symbiotic X-ray binary with the hot component being a neutron star, or less likely a black hole, as discussed in Bahramian et al. (2014). The object has detectable X-ray pulsations, and an X-ray outburst was detected as reported in Chenevez et al. (2022).

References

Bahramian, A., Gladstone, J. C., Heinke, C. O. et al., 2014, MNRAS, 441, 1, 640, 2014MNRAS.441..640B
Chenevez, J., Brandt, S., Lund, N. et al., 2022, ATel, 15236, 1, 2022ATel15236....1C
Heinke, C. O., Tomsick, J. A., Yusef-Zadeh, F. et al., 2009, ApJ, 701, 2, 1627, 2009ApJ...701.1627H

2XMM J174445.4-295046