LMC X-2: Hunting the Z

Details LMC X-2: Hunting the Z LMC X-2: Hunting the Z

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.9507s&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #95.07; Bulletin of the American Astronomical Society, Vol. 33, p.1446

Astronomy and Astrophysics

Astronomy

Scientific paper

We have performed three observations of LMC X-2 with RXTE in 1997 Dec, 2001 Feb, and most recently 2001 Aug-Sep, with further pointings scheduled for late 2001. Based on our results to date (see e.g. Smale & Kuulkers 2000, ApJ, 528, 702) we have developed the working hypothesis that LMC X-2 is a Z-source, spending most of its time in the Flaring Branch with occasional excursions onto the Normal Branch -- behavior reminiscent of the Z-source GX349+2. If confirmed, this would make LMC X-2 the eighth Z-source known and the first outside our Galaxy. We will present a summary of our LMC X-2 campaign, including light curves and color-color diagrams illustrating the two branches and the results of timing and spectral fitting analyses, and discuss our future strategy for resolving the nature of this bright low-mass X-ray binary.

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