Searching for periodicities in the MACHO light curve of LMC X-2

Abstract

Using the exceptional long-term monitoring capabilities of the MACHO project, we present here the optical history of LMC X-2 for a continuous 6-yr period. These data were used to investigate the previously claimed periodicities for this source of 8.15 h and 12.54 d : we find upper amplitude limits of 0.10 mag and 0.09 mag, respectively.

arXiv comment4 pages, 4 figures. Minor changes, including title. MNRAS, in press

References in corpus (5)

• Warped accretion discs and the long periods in X-ray binaries
• Calibration of the MACHO Photometry Database
• EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING.
• The mass of the neutron star in Cyg X-2 (V1341 Cyg)
• Probable Gravitational Microlensing towards the Galatic Bulge

Cited by in corpus (3)

• Correlated Optical and X-ray Variability in LMC X-2
• Exoplanets in the Antarctic sky. II. 116 Transiting Exoplanet Candidates Found by AST3-II (CHESPA) within the Southern CVZ of TESS
• A signature of the donor star in the extra-galactic X-ray binary LMC X-2