New Online Database of Symbiotic Variables: 47 Tuc Src-No. 556

Constellation
Tucana

Equatorial coordinates
α = 00 25 44.195
δ = -72 18 53.575

Galactic coordinates
l = 305.6722°
b = -44.6764°

Suspected	2021^Ref
Confirmed	-
Symbiotic IR type	S?^Ref
Hot component type	shell-burning?^Ref
Outbursts	-

Identifiers

47 Tuc Src-No. 556	IRAS -	GSC2.4.2 S0W5001156	AAVSO -
SIMBAD Cl* NGC 104 LEE 8518	Pan-STARRS -	SAO -	VSX -
GAIA DR3 4689573914617758336	SkyMapper 002544.17-721853.5	WRAY -	GCVS -
2MASS JJ00254416-7218536	HIP -	Hen -	BD -
WISE J002544.18-721853.5	TYC -	ESO -	HD -

Symbiotic Catalogs

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

Position

Right ascension (°)	6.4341^Ref	Parallax (mas)	0.222±0.013^Ref	Reddening E(B-V) (mag)	0.03±0.0^Ref ^{, Note}
Declination (°)	-72.3149^Ref	Distance (kpc)	4.28^Ref ^{, Note}, 4.33^Ref ^{, Note}
Galactic longitude (°)	305.6722^Ref	Proper motion in α (mas/yr)	5.65±0.02^Ref
Galactic latitude (°)	-44.6764^Ref	Proper motion in δ (mas/yr)	-2.61±0.01^Ref

Observations

X-Ray	Yes^Ref	IR type	S?^Ref	Radio	-
X-Ray type	β^Ref	J (mag)	11.13^Ref	Flickering	-
GALEX FUV (mag)	-	H (mag)	10.54^Ref	Outbursts	-
GALEX NUV (mag)	21.83^Ref	K (mag)	10.46^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	10.36^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	10.46^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	10.23^Ref	IPmax (eV)	-
B (mag)	14.21^Ref	WISE W4 (mag)	9.28^Ref	[O III] lines	-
V (mag)	13.11^Ref	IRAS 12μm (Jy)	-	He II lines	-
R (mag)	-	IRAS 25μm (Jy)	-	[Fe VII] lines	-
I (mag)	-	IRAS 60μm (Jy)	-	O VI lines	-
BP (mag)	13.37^Ref	IRAS 100μm (Jy)	-
G (mag)	12.80^Ref	AKARI S09 (Jy)	-
RP (mag)	12.08^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-14.14±0.76^Ref	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	-	Mass (M_⊙)	-	Pulsation	-
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	-
IR type	S?^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	-
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

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

Links

SIMBAD CDS Portal

Notes

Suspected in the first version of Saeedi et al. (2021), based on the X-ray detection by eROSITA and a possible RGB counterpart. In the second version, it was changed to an RS CVn contact binary candidate.

References

Saeedi, S., Liu, T., Knies, J. et al., 2021, arXiv, arXiv:2106.14535, 2021arXiv210614535S

47 Tuc Src-No. 556