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Latest Details
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| Name |
V0404 Cyg |
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| AAVSO UID |
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| Constellation |
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| J2000.0 |
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| B1950.0 |
20 22 06.37 +33 42 16.2 |
| Galactic coord. |
73.119 -2.091 |
Other names
(Internal only)
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Please note that aliases shown in grey link to obsolete records.
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AAVSO 2020+33 |
AN 100.1938 |
Downes V0404 Cyg |
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GS 2023+338 |
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(Not logged in) Add name
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| Variability type |
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LMXB/BHXB/XN |
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| Spectral type |
K0IV+Black hole |
| Mag. range |
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11.2 - 18.8 V |
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| Discoverer |
A. A. Wachmann |
| Epoch |
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| Outburst |
1938 |
| Period |
6.47083 d |
| Rise/eclipse dur. |
-- |
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Remarks
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Some references may be clicked to view in new window. Roll over index number to view submission details.
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1 |
Otero, Sebastian Alberto
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VSP Note: 18.9 Vmag. companion 1.4" to the North and 18.5 Vmag. star 7" to the South. |
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2 |
Otero, Sebastian Alberto
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Ellipsoidal variations at minimum V= 18.4 - 18.8; R= 16.5 - 16.9. Close companion (V= 18.9; R= 17.52) 1.4" away. (1993MNRAS.265..834C and 2004MNRAS.352..877Z). Position in the table is for the blend. Also the ~18.5 Vmag. star 2MASS J20240376+3351562 lies 7" away. |
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3 |
Admin, VSX
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0.3 mag ellipsoidal variations during the orbital cycle with superimposed fast variability. |
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(Not logged in) Add remark
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References
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Click reference title/citation to view in new window. Roll over index number to view submission details.
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1 |
Corral-Santana, J. M.; Casares, J.; Muņoz-Darias, T.; et al., 2016,
WATCHDOG: A Comprehensive All-sky Database of Galactic Black Hole X-ray
Binaries |
2016ApJS..222...15T |
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2 |
R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) |
2005JAD....11....2D |
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3 |
C. Zurita, J. Casares, R.I. Hynes, T. Shahbaz, P.A. Charles, E.P. Pavlenko,
2004, MNRAS 352, 877 |
2004MNRAS.352..877Z |
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4 |
R.A. Downes et al., 2001, PASP 113, 764 |
2001PASP..113..764D |
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5 |
Casares, J.; et al., 1993, Optical Studies of V:404-CYGNI the X-Ray
Transient GS:2023+338 - Part Three - the Secondary Star and Accretion Disc |
1993MNRAS.265..834C |
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6 |
A.A.Wachmann, Erg AN 11, N5, 1948. |
-- |
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External Links
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Location
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Catalog Data
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Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
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2MASS
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J = 13.57 | H = 12.68 | K = 12.32 | J - K = 1.25 |
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Images
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Supporting Documents
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Campaigns/Programs
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Legacy CVs
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BAA VSS Recurrent Objects Programme
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Revision History
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Currently approved revision is checked. Click revision number to view details of that revision.
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