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Name
  GP Vel  
AAVSO UID
000-BFP-292 (No observations)  
Constellation
Vela Sequence
J2000.0
09 02 06.86 -40 33 16.9  (135.52858 -40.55469) Search nearby
B1950.0 09 00 13.24 -40 21 25.1
Proper motion
RA: -4.879 +/- 0.029 mas/yDec: 9.278 +/- 0.033 mas/ySource: Gaia DR1
Galactic coord. 263.058 +3.930
Other names

(Internal only)
1RXS J090207.0-403311 4U 0900-40 CD-40 4838
CPD-40 3072 GX 263+03 HD 77581
HIP 44368 SAO 220767 Vel X-1
X 09002-403    
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Variability type
HMXB/XP+E
Spectral type B0.5Iaeq
Mag. range
6.76 - 6.99 V
Discoverer --
Epoch
30 Nov 2003 (HJD 2452974.227) Ephemeris
Outburst --
Period 8.964357 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto X-ray eclipses.
2 GCVS Team Min II = 6.90. Min II - Min I = 0.55P. The shape of the light curve varies. There are probably long-period light oscillations: Min = 2442681.6 + 93.3d*E (A ~0.02m) [T.S.Khruzina, A.M.Cherepashchuk, Astron. Zh. 59, N3, 512, 1982.]. The period of X-ray pulses var: 282.8913s (1975.5) [S.Rappaport, J.Mc Clintock, IAU Circ N2833, 1975.]; 282.919s (1975.7) [H.Ogelman, K.P.Beuermann, G.Kanbach, H.A.Mayer-Hasselwander, D.Capozzi, E.Fiordilino, NO, D.Molteni, AsAp 58, 385, 1977.]; 282.869s (1976.4), 282.838s (1976.9) [R.H.Becker, R.E.Rothschild, E.A.Boldt, S.S.Holt, S.H.Pravdo, P.J.Serlemitsos, J.H.Swank, ApJ 221, 912, 1978.]; 282.80s (1978.9) [R.Staubert, E.Kendziorra, W.Pietsch, C.Reppin, J.Trumper, W.Voges, ApJ 239, 1010, 1980.]; 282.745s (1979.3), 282.7874s (1980.3), 282.87s (1981.0) [M.Oda, IAU Circ N3575, 1981.]; 282.93s (1981.9 - 1982.9); 282.9306s (1983.2) [F.Nagase, S.Hayakawa, T.Ku, N.Sato, T.Ikegami, N.Kawai, K. Makishima, M.Matsuoka, K.Mitaki, T.Murakami, M.Oda, T.Ohashi, Y.Tanaka, Sh.Kitamoto, PAS Japan 36, N4, 667, 1984.].
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References
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1 High variability in Vela X-1: giant flares and off states 2008A&A...492..511K
2 T.S.Khruzina, A.M.Cherepashchuk, Astron. Zh. 59, N3, 512, 1982. 1982AZh....59..512K
3 B.Warner, F.Bateson, NZAS Publ N4, 18, 1976. --
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 5.83H = 5.71K = 5.60J - K = 0.24
AllWISE W1 = 5.46W2 = 5.25W3 = 5.27W4 = 3.70W1 - W2 = 0.20W3 - W4 = 1.57
APASS-DR9
Images
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Supporting Documents
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Revision History
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3 Otero, Sebastian Alberto 2011-05-23 23:27 UTC Primary record creation. Type, orbital period and epoch from reference.
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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