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V818 Scorpii: Insights from the AAVSO and RASNZ Databases


Alan Plummer

Linden Observatory, 105 Glossop Road, Linden, NSW 2778, Australia


Received July 11, 2005; revised June 15, 2006; accepted June 16, 2006

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Abstract  Insight into the Low Mass X-ray Binary system V818 Scorpii (Scorpius X-1) is gained from an examination of the visual databases of the American Association of Variable Star Observers (AAVSO) and the Variable Star Section of the Royal Astronomical Society of New Zealand (RASNZ). A correlation is found between these visual estimates and EXOSAT X-ray observations. While such a correlation has long been known to exist from B-magnitude photometric studies, no such work is known with the AAVSO and the RASNZ data.

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