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Details for Revision 5
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Name
  V4641 Sgr  
AAVSO UID
000-BCB-994 (52715 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 19 21.63 -25 24 25.9  (274.84013 -25.40719) Search nearby
B1950.0 18 16 16.25 -25 25 43.7
Galactic coord. 6.774 -4.789
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1SWXRT J181921.6-252425 1SXPS J181921.7-252425 2MASS J18192163-2524258
AAVSO 1813-25B CXOGSG J181921.6-252425 Downes V4641 Sgr
GSC 06848-03786 Goranskij's variable J1819-2524
OGLE-BLG-ECL-408340 OGLEIII BLG261.2.109821 SAX J1819.3-2525
UCAC4 323-158574 XMMSL2 J181921.7-252429 XTE J1819-254
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Variability type
HMXB/BHXB/XN
Spectral type B9III+BH
Mag. range
9.0 - 13.8 V
Discoverer --
Epoch
--
Outburst --
Period 2.81667 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 Grazing eclipse of the B-star by the disk superposed to the ellipsoidal variations (2001ApJ...555..489O).
2 Otero, Sebastian Alberto Microquasar. Black hole candidate.
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References
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1 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties		 2018A&A...616A...1G
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
3 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
4 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
5 Soszynski, I.; et al., 2016, The OGLE Collection of Variable Stars. Over
450 000 Eclipsing and Ellipsoidal Binary Systems Toward the Galactic Bulge		 2016AcA....66..405S
6 Catalogue of high-mass X-ray binaries in the Galaxy (4th edition) 2006A&A...455.1165L
7 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
8 Catalogue of cataclysmic binaries, low-mass X-ray binaries and related
objects (7th Edition)		 2003A&A...404..301R
9 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
10 Goranskij, V. P., 2001, The Orbital V-band Light Curve of V4641 Sagittarii 2001IBVS.5068....1G
11 Orosz, J. A.; Kuulkers, E.; van der Klis, M.l; et al., 2001, A Black Hole
in the Superluminal Source SAX J1819.3-2525 (V4641 Sgr)		 2001ApJ...555..489O
12 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 2001ApJ...555..489O
13 IAU Circ No.7253, 1999. 1999IAUC.7253....1S
14 V.P.Goranskij, IBVS N3464, 1990. 1990IBVS.3464....1G
External Links
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Supporting Documents
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Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
8 Otero, Sebastian Alberto 2020-05-15 00:39 UTC Gaia DR2 position.
7 Otero, Sebastian Alberto 2020-01-28 02:37 UTC Period and epoch from 2016AcA....66..405S.
6 Otero, Sebastian Alberto 2019-05-20 20:13 UTC Type from 2001ApJ...555..489O. Minimum magnitude from ASAS-SN data. Gaia DR2 position.
5 Otero, Sebastian Alberto 2018-02-28 02:56 UTC Type and spectral type from 2016ApJS..222...15T. UCAC4 position.
4 Otero, Sebastian Alberto 2011-08-11 19:50 UTC Reference added.
3 Otero, Sebastian Alberto 2011-08-11 19:49 UTC Spectral type and orbital period from Ritter and Kolb (2011, 2003A&A...404..301R) Type from 2006A&A...455.1165L. 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.

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