VSX : Detail for MGAB-V3395

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Name

MGAB-V3395

AAVSO UID

000-BNP-493 (1992 observations)

Constellation

Cygnus

Sequence

J2000.0

20 17 58.45 +37 56 00.6 (304.49354 +37.93350)

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B1950.0

20 16 07.64 +37 46 36.3

Galactic coord.

75.765 +1.233

Other names

(Internal only)

2MASS J20175844+3756006	ATO J304.4935+37.9334	CMC15 201758.4+375600
Gaia DR2 2061053654587545728	IPHAS J201758.46+375600.7	UCAC4 640-090816
UGPS J201758.44+375600.7	URAT1 640-416016	USNO-A2.0 1275-13782041
USNO-B1.0 1279-499995	WISEA J201758.40+375600.0

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Variability type

E+YSO:

Spectral type

Mag. range

14.5 - 15.23 r

Discoverer

Gabriel Murawski

Epoch

14 Jan 2019 (HJD 2458498.0)

Ephemeris

Outburst

Period

227.0 d

Rise/eclipse dur.

21% (48 d)

Remarks

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Murawski, Gabriel

Dolidze 40 open cluster member. Possibly an eccentric binary with a secondary eclipse at phase = 0.62 (eclipse duration 8%), however the eclipse was not present before 2017 (ASAS-SN V-band data). A complex eclipse observed in 2019 suggests the presence of a circumstellar disk. Out of eclipse brightness variations up to 0.20 mag (ZTF data). Significant infrared excess (2MASS, WISE). ASAS-SN magnitudes contaminated by 2MASS J20175955+3755565 (g= 14.7 mag, sep. 13"). Range has been corrected. BP-RP= 1.02; g-r= 0.56.

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References

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1	G. Murawski, 2020 (online data)	--
2	Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing, Products, and Archive	2019PASP..131a8003M
3	Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0	2017PASP..129j4502K

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Images

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Supporting Documents

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2	Phase plot	Murawski, Gabriel	2020-07-30 20:01 UTC	Combined phase curve with ZTF and ASAS-SN data.
1	JD plot	Murawski, Gabriel	2020-07-30 20:01 UTC	Combined light curve with ZTF and ASAS-SN data.