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Name
  LMC V3434  
AAVSO UID
000-BCZ-290 (4583 observations)  
Constellation
Dorado Sequence
J2000.0
05 35 41.00 -66 51 53.5  (83.92082 -66.86487) Search nearby
B1950.0 05 35 42.94 -66 53 39.5
Proper motion
RA: -5.4 +/- 2.0 mas/yDec: -2.8 +/- 2.1 mas/ySource: UCAC4
Galactic coord. 276.882 -32.195
Other names

(Internal only)
1A 0535-668 1A 0538-66 1RXS J053539.0-665158
2MASS J05354101-6651535 2S 0535-668 A 0538-66
A0538-66 AAVSO 0535-66 AAVSO_ALIAS V3434 LMC
AAVSO_DES 0535-66 AO 0538-66 Gaia19bpr
RX J0535.6-6651 [FS2003] 0289 [HP99] 436
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Variability type
HMXB/XP+XN
Spectral type B0.5-B1II/III-B9Ieq
Mag. range
12.2 - 15.7 V
Discoverer --
Epoch
06 May 1972 (HJD 2441443.643) Ephemeris
Outburst --
Period 16.6460 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Also periodic variability with elements: JD 2449002.109 + 421.29 x E probably caused by formation and depletion of an equatorial disk (2003MNRAS.339..748M). DPV with period ratio 25.31? GCVS team remark: "Sp B2IIIe (Min) - B9Ieq (Max). Max: Lx/Lopt > 1. In the region of the cluster NGC 2034. Alternating "off" states up to 1 year duration (absence of outbursts), and "on" states with periodic outbursts simultaneously in the optical and in the X-ray range. The duration of an outburst is from 0.1 d to 15 d. During outbursts the X-ray pulsar has been observed, P= 0.06921166 s (t0= JD 2444590.4792, P/dt=5.01x10^(-10)). During the "on" state, the amplitude of optical outbursts gradually decreases. No periodicity has been found in optics outside outbursts. An increase of linear optical polarization during outburst has been noted. The B component probably undergoes shell events when outbursts occur during the passages of the neutron star through the periastron of the high-eccentricity orbit (e=0.7, Porb =16.7)."
2 VSX Admin NAME CHGD 07/99; DESIG CORRECTED FROM 0534-66 & PARAMETERS UPDTD 7/26/02
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References
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1 Morel, M., 2020, Updated positions for the LMC II 4801 GCVS stars, VSS
Newsletter 2020-3 (July 2020)		 --
2 Gaia Alerts, 2019 (online data) --
3 Samus, N. N.; et al., 2017, General catalogue of variable stars: Version
GCVS 5.1. Extragalactic Variable Stars. Catalogue (Vol. V)		 2017ARep...61...80S
4 On the stability of the 421-d periodicity in A0538-66 2003MNRAS.339..748M
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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 = 15.15H = 15.10
AllWISE W1 = 15.26W2 = 15.43W1 - W2 = -0.18
Images
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Supporting Documents
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Stellar Association Membership
 LMC Large Magellanic Cloud
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Morel, Mati 2021-05-03 12:36 UTC Range from the GCVS Extragalactic Variable Stars Catalogue and VSS Newsletter 2020-3. Gaia DR2 position.
4 Otero, Sebastian Alberto 2019-04-30 19:47 UTC Gaia DR2 position.
3 Otero, Sebastian Alberto 2012-07-20 22:56 UTC Flag set to variable.
2 Otero, Sebastian Alberto 2012-04-06 08:19 UTC Type, range and elements from 2003MNRAS.339..748M.
1 Admin, VSX 2009-10-23 00:55 UTC Preserved original object data.

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