Rossi-XTE long-term monitoring of eta carinae

M. F. Corcoran, K. Ishibashi, J. H. Swank, K. Davidson, R. Petre, R. Viotti, J. H.M.M. Schmitt

Research output: Contribution to journalArticlepeer-review


The unstable star η Carinae is arguably the Galaxy's most massive known star or an extremely peculiar massive binary. We report first results of ∼ weekly RXTE monitoring of η Car during the 1996 Feb - 1997 Jun interval, with daily coverage in 1997 Jun-Jul; this represents the most detailed description of the X-ray emission of this or any other massive star. Our RXTE results show a progressive increase in the average 2-10 keV flux through the observing interval. Most surprisingly, we find peaks in the X-ray lightcurve which occur every 85±1.2 days. We consider possible causes of the X-ray variations.

Original languageEnglish (US)
Pages (from-to)33-35
Number of pages3
JournalNuclear Physics B - Proceedings Supplements
Issue number1-3
StatePublished - Jan 1999


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