AAVSO Home



Welcome, Guest. You are not logged in.
Log in
    Revise    New Search
Details for Revision 3
Log in to retrieve additional aliases from SIMBAD.
Name
  V1341 Cyg  
AAVSO UID
000-BCV-722 (3 observations)  
Constellation
Cygnus Sequence
J2000.0
21 44 41.16 +38 19 16.9  (326.17150 +38.32136) Search nearby
B1950.0 21 42 36.91 +38 05 26.8
Galactic coord. 87.328 -11.316
Other names

(Internal only)
1RXS J214429.0+381913 2MASS J21444115+3819170 3U 2142+38
AAVSO 2140+37 Cyg X-2 IOMC 3184000081
X 21426+380    
(Not logged in)  Add name
Variability type
LMXB+E
Spectral type A5-F2III-IVep
Mag. range
14.41 - 15.78 B
Discoverer --
Epoch
18 Jan 1977 (HJD 2443162.1) Ephemeris
Outburst --
Period 9.8435 d
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto V= 14.5.
2 GCVS Team Cyg X-2. SB1. Halo object (nu = -220 km/s). Strong reflection effect changes the spectral type of the F component. Spectral line profiles vary. The lines of He II, KCa II, C III,and N III are in emission. The system has low and high states. During the low state the mean light curve is a double wave with the range 15.1m - 15.4m B. Epoch of Min I given in the Table corresponds to the F star in superior conjunction; Min II 15.4. The eclipse of the accretion disk at the phase 0.5P in partial. Rapid light variability by 0.1m in 10 minutes and by 0.5m in several hours is superimposed. In the high states lasting for ~10d the mean light increases by 0.5m. Radio source at 8085 MHz, source of soft and hard X-ray emission from 0.1 to 60 KeV.
(Not logged in)  Add remark
References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties		 2018A&A...616A...1G
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth
edition)		 2007A&A...469..807L
4 A catalogue of low-mass X-ray binaries in the Galaxy, LMC, and SMC (Fourth
edition)		 2007A&A...469..807L
5 A.P.Cowley, D.Crampton, J.B.Hutchings, ApJ 231, 539, 1979. 1979ApJ...231..539C
6 R.Giacconi, P.Gorenstein, H.Gursky, P.D.Usher, J.R.Waters, A.Sandage,
P.Osmer, J.V.Peach, ApJ 148, L129, 1967.		 1967ApJ...148L.129G
External Links
Links open in a new window. Not all links may be valid for this particular target.
Location    Go   
Select a Location for more details.
Supporting Documents
There are currently no supporting documents on file for this star. (Not logged in)  Add document
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
4 Otero, Sebastian Alberto 2020-05-15 00:51 UTC Gaia DR2 position.
3 Otero, Sebastian Alberto 2011-05-23 03:05 UTC Primary record creation. Type from reference. UCAC3 position.
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

Guidelines    FAQ    Manual    Forum    Variability Types    Passbands    Copyright    Acknowledgments    Privacy    Contact    Help us   
The International Variable Star Index
© 2005-2025 American Association of Variable Star Observers (AAVSO)
Version 1.1 [C]
172.30.1.145