Updated Orbital Ephemeris and Detection of Superhump Modulation in X-Ray Band for the Ultra-compact Low Mass X-Ray Binary 4U 1820-30

Keyphrases

• X-ray 100%
• Orbital Period 100%
• Ultra-compact 100%
• Ephemeris 100%
• Low-mass X-ray Binaries 100%
• Superhumps 100%
• Light Curves 66%
• Neutron Stars 66%
• Binary System 66%
• Phase Evolution 66%
• Stars Interiors 66%
• Ultraviolet Band 33%
• Hubble Space Telescope 33%
• Accretion Discs 33%
• Far Ultraviolet 33%
• Globular Clusters 33%
• Historical Records 33%
• Orbital Modulation 33%
• Periodic Modulation 33%
• Dwarf Novae 33%
• Apsidal Precession 33%

Physics

• Ephemeris 100%
• Low-Mass X-Ray Binary Stars 100%
• Neutron Stars 50%
• Light Curve 50%
• Hubble Space Telescope 25%
• Accretion Disk 25%
• Globular Cluster 25%
• Dwarf Nova 25%