OBSERVATIONS OF VELA XR-1 BY THE UCSD X-RAY TELESCOPE ON OSO-7ULMER MP; BAITY WA; WHEATON WA et al.1972; ASTROPHYS. J.; U.S.A.; DA. 1972; VOL. 178; NO 3, PART 2; PP. L121-L126; BIBL. 16REF.Serial Issue

AN X-RAY TRANSIENT IN THE VELA X-1 REGIONTSUNEMI H; MIYAMOTO S; YAMASHITA K et al.1981; PUBL. ASTRON. SOC. JPN.; ISSN 0004-6264; JPN; DA. 1981; VOL. 33; NO 1; PP. 205-208; BIBL. 10 REF.Article

ON THE SPIN DOWN EPISODES OF VELA X-1MOLTENI D; RAPISARDA M; RE S et al.1982; ASTRON. ASTROPHYS. (BERL.); ISSN 0004-6361; DEU; DA. 1982; VOL. 111; NO 2; PP. 365-367; BIBL. 14 REF.Article

EXTENDED OBSERVATIONS OF VELA X-1 BY OSO 8.BECKER RH; ROTHSCHILD RE; BOLDT EA et al.1978; ASTROPHYS. J.; U.S.A.; DA. 1978; VOL. 221; NO 3 PART. 1; PP. 912-916; BIBL. 20 REF.Article

TIME VARIATION OF THE PULSE PERIOD OF VELA X-1NAGASE F.1981; SPACE SCI. REV.; ISSN 0038-6308; NLD; DA. 1981; VOL. 30; NO 1-4; PP. 395-398; BIBL. 7 REF.Conference Paper

ARIEL V SKY SURVEY: OBSERVATIONS OF THE ACCRETION WAKE IN VEL X-1.EADIE G; PEACOCK A; POUNDS KA et al.1975; MONTH. NOT. R. ASTR. SOC.; G.B.; DA. 1975; VOL. 172; NO 3; PP. 35P-39P; BIBL. 11 REF.Article

THE ANOMALOUS X-RAY ABSORPTION SPECTRUM OF VELA X-1KALLMAN TR; WHITE NE.1982; ASTROPHYSICAL JOURNAL; ISSN 0004-637X; USA; DA. 1982; VOL. 261; NO 1; PART 2; PP. L35-L39; BIBL. 33 REF.Article

X-RAY AND OPTICAL OBSERVATIONS OF 3U 0900-40 (VELA X-1).CHARLES PA; MASON KO; WHITE NE et al.1978; MONTH. NOT. R. ASTR. SOC.; G.B.; DA. 1978; VOL. 183; NO 3; PP. 813-820; BIBL. 22 REF.Article

FOUR-COLOUR PHOTOMETRIC OBSERVATIONS OF THE X-RAY BINARY STAR HD 77581 (VELA X-1). I. OBSERVATIONS.ZUIDERWIJK EJ; HAMMERSCHLAG HENSBERGE G; VAN PARADIJS J et al.1977; ASTR. AND ASTROPHYS., SUPPL. SER.; GERM.; DA. 1977; VOL. 27; NO 3; PP. 433-434; BIBL. 2 REF.Article

LIMITATIONS ON THE MASSES AND OTHER DIMENSIONS OF THE BINARY HD 77581.MIKKELSEN DR; WALLERSTEIN G.1974; ASTROPHYS. J.; U.S.A.; DA. 1974; VOL. 194; NO 2 PART. 1; PP. 459-463; BIBL. 35 REF.Article

ARIEL V HARD X RAY OBSERVATIONS OF VELA X-1LIEU R; ENGEL AR; QUENBY JJ et al.1982; ASTROPHYS. LETT.; ISSN 0004-6388; USA; DA. 1982; VOL. 22; NO 4; PP. 135-137; BIBL. 12 REF.Article

DISCOVERY OF OPTICAL PULSATIONS IN HD 77581=-VELA X-1.STEINER JE.1977; ASTR. AND ASTROPHYS.; GERM.; DA. 1977; VOL. 61; NO 5; PP. L35-L36; BIBL. 7 REF.Article

HIGH-DISPERSION SPECTROSCOPIC OBSERVATIONS OF HD 77581, A CANDIDATE FOR VELA XR-1 (2U 0900-40).WALLERSTEIN G.1974; ASTROPHYS. J.; U.S.A.; DA. 1974; VOL. 194; NO 2 PART. 1; PP. 451-457; BIBL. 17 REF.Article

IONIZATION EFFECTS IN STELLAR WINDS OF MASSIVE X-RAY BINARIESHAMMERSCHLAG HENSBERGE G.1981; ASTROPHYS. SPACE SCI. LIBR.; ISSN 0067-0057; NLD; DA. 1981; VOL. 89; PP. 457-460; BIBL. 4 REF.Conference Paper

LONG-TERM STUDIES WITH THE ARIEL S ASM. I. HERCULES X-1, VELA X-1, AND CENTAURUS X-3HOLT SS; KALUZIENSKI LJ; BOLDT EA et al.1979; ASTROPHYS. J.; USA; DA. 1979; VOL. 227; NO 2 PART. 1; PP. 563-568; BIBL. 12 REF.Article

MASSES FOR VELA X-1 AND OTHER X-RAY BINARIES.AVNI Y; BAHCALL JN.1975; ASTROPHYS. J.; U.S.A.; DA. 1975; VOL. 202; NO 3 PART. 2; PP. 131-134; BIBL. 21 REF.Article

LIMITS ON RAPID X-RAY PULSING IN X-RAY BINARIES.SPADA G; BRADT H; DOXSEY R et al.1974; ASTROPHYS. J.; U.S.A.; DA. 1974; VOL. 190; NO 3 PART. 2; PP. 113-115; BIBL. 15 REF.Article

Sudden disappearance of X-ray emission from Vela X-1 ― can this be due to eclipse by a planet of HD77581?HAYAKAWA, S.Advances in space research. 1984, Vol 3, Num 10-12, pp 35-38, issn 0273-1177Article

Ultraviolet spectroscopic observations of HD 77581 (Vela X-1=4U 0900-40)SADAKANE, K; HIRATA, R; JUGAKU, J et al.The Astrophysical journal. 1985, Vol 288, Num 1, pp 284-291, issn 0004-637X, 1Article

The orbital parameters and the X-ray pulsation of Vela X-1 (4U 0900-40)VAN DER KLIS, M; BONNET-BIDAUD, J. M.Astronomy and astrophysics (Berlin. Print). 1984, Vol 135, Num 1, pp 155-170, issn 0004-6361Article

DOES HBETA PULSE IN HD 77581(4U 0900-40=VELA XR-1).THOMAS RM; MURDIN P; MORTON DC et al.1981; MON. NOT. R. ASTRON. SOC.; ISSN 0035-8711; GBR; DA. 1981; VOL. 195; NO 3; PP. 915-919; BIBL. 10 REF.Article

A DISCUSSION ON VBLU W PHOTOMETRY OF THE X-RAY BINARY HD 77581 (=VELA X-1=3 U 0900-40) AND ON THE OVERLUMINOSITY OF THE PRIMARIES IN X-RAY BINARIES. THE OPTICAL MICRO VARIABILITY OF THE HOT SUPERGIANT PRIMARIES HD 77581 AND HD 153919VAN GENDEREN AM.1981; ASTRON. ASTROPHYS. (BERL.); ISSN 0004-6361; DEU; DA. 1981; VOL. 96; NO 1-2; PP. 82-90; BIBL. 43 REF.Article

THE REGIME OF RELATIVISTIC ACCRETION ON X-RAY PULSARSMYTROPHANOV IG; TSYGAN AI.1978; ASTR. AND ASTROPHYS.; DEU; DA. 1978; VOL. 70; NO 1-2; PP. 133-139; BIBL. 16 REF.Article

OBSERVATIONS OF BINARY X-RAY SOURCES WITH ARIEL 5.POUNDS KA.1976; PROC. R. SOC. LONDON, A; G.B.; DA. 1976; VOL. 350; NO 1663; PP. 441-461; H.T. 1; BIBL. 24 REF.Article

A SEARCH FOR OPTICAL PULSATIONS FROM X-RAY SOURCES NEAR LAMBDA LAMBDA 4640-4650 AND LAMBDA 4686.CANIZARES CR; MCCLINTOCK JE.1975; ASTROPHYS. J.; U.S.A.; DA. 1975; VOL. 200; NO 1 PART. 1; PP. 177-181; BIBL. 39 REF.Article