New Online Database of Symbiotic Variables: GSC 06806-00016

Constellation
Scorpius

Equatorial coordinates
α = 16 19 33.342
δ = -28 07 39.986

Galactic coordinates
l = 349.1193°
b = 15.5413°

Suspected	2007^Ref
Confirmed	2007^Ref
Symbiotic IR type	S^Ref
Hot component type	accreting-only^Ref
Outbursts	-

Identifiers

GSC 06806-00016	IRAS -	GSC2.4.2 S8R1000319	AAVSO 000-BNS-489
SIMBAD GSC 06806-00016	Pan-STARRS 74242448887356950	SAO -	VSX 281668
GAIA DR3 6039227323926220544	SkyMapper 161933.34-280739.8	WRAY -	GCVS -
2MASS J16193334-2807397	HIP -	Hen -	BD -
WISE J161933.34-280739.8	TYC -	ESO -	HD -

Symbiotic Catalogs

Bidelman (1954)	-	Allen (1984)	-	Belzcyński et al. (2001)	-
Gaposchkin (1957)	-	Kenyon (1986)	-	Akras et al. (2019)	IRG J16194-2810 (Conf.)
Boyarchuk (1969)	-	Vaidis (1988, 1991)	-

Position

Right ascension (°)	244.8889^Ref	Parallax (mas)	0.452±0.036^Ref	Reddening E(B-V) (mag)	0.53±0.02^Ref ^{, Note}
Declination (°)	-28.1278^Ref	Distance (kpc)	3.7^Ref 2.10^Ref ^{, Note}, 2.13^Ref ^{, Note}
Galactic longitude (°)	349.1193^Ref	Proper motion in α (mas/yr)	-0.89±0.04^Ref
Galactic latitude (°)	15.5413^Ref	Proper motion in δ (mas/yr)	-5.29±0.03^Ref

Observations

X-Ray	Yes^Ref	IR type	S^Ref	Radio	-
X-Ray type	γ^Ref	J (mag)	8.27^Ref	Flickering	No^Ref
GALEX FUV (mag)	-	H (mag)	7.33^Ref	Outbursts	-
GALEX NUV (mag)	-	K (mag)	6.98^Ref	Outburst type	-
IUE	No^Ref	WISE W1 (mag)	6.77^Ref	Jets	-
FUSE	No^Ref	WISE W2 (mag)	6.96^Ref	Resolved nebula	-
U (mag)	-	WISE W3 (mag)	6.79^Ref	IPmax (eV)	No lines^Ref
B (mag)	14.70^Ref	WISE W4 (mag)	6.73^Ref	[O III] lines	No^Ref
V (mag)	12.78^Ref	IRAS 12μm (Jy)	-	He II lines	No^Ref
R (mag)	11.00^Ref	IRAS 25μm (Jy)	-	[Fe VII] lines	No^Ref
I (mag)	9.98^Ref	IRAS 60μm (Jy)	-	O VI lines	No^Ref
BP (mag)	12.97^Ref	IRAS 100μm (Jy)	-
G (mag)	11.42^Ref	AKARI S09 (Jy)	0.11^Ref
RP (mag)	10.22^Ref	AKARI S18 (Jy)	-

Orbit

Orbital period (days)	-	γ velocity (km/h)	-20.91±5.28^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	M2 III^Ref	Mass (M_⊙)	-	Pulsation	Yes?^Ref
Eff. temperature (K)	-	Radius (R_⊙)	-	Type	SR^Ref
IR type	S^Ref	Luminosity (L_⊙)	-	Pulsation period (days)	192.8^Ref
Metallicity [Fe/H]	-			Pulsation ephemeris	-

Hot component

Type/Spectral type	NS^Ref	Mass (M_⊙)	-	Spin period (min)	242.839^Ref
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

The discovery of the fifth symbiotic binary hosting a NS was reported by Masetti et al. (2007). Luna (2023) utilized TESS data to detect the spin period of the NS of 242.837 min. A comprehensive study of the system has been presented in Bozzo et al. (2024).

References

Bozzo, E., Romano, P., Ferrigno, C. et al., 2024, MNRAS, 527, 2, 3585, 2024MNRAS.527.3585B
Kitamura, Y., Takahashi, H., Fukazawa, Y., 2014, PASJ, 66, 1, 6, 2014PASJ...66....6K
Luna, G. J. M., 2023, A&A, 676, L2, 2023A&A...676L...2L
Masetti, N., Landi, R., Pretorius, M. L. et al., 2007, A&A, 470, 1, 331, 2007A&A...470..331M
Merc, J., Beck, P. G., Mathur, S. et al., 2023, arXiv, arXiv:2312.16126, 2023arXiv231216126M

GSC 06806-00016