Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-04-04
Astrophys.J.701:1742-1752,2009
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
24 pages, 18 figures. Preprint typeset using LaTeX style emulateapj v. 04/20/08
Scientific paper
10.1088/0004-637X/701/2/1742
We present a new approach to the analysis of time symmetry in light curves, such as those in the x-ray at the center of the Scorpius X-1 occultation debate. Our method uses a new parameterization for such events (the bilogistic event profile) and provides a clear, physically relevant characterization of each event's key features. We also demonstrate a Markov Chain Monte Carlo algorithm to carry out this analysis, including a novel independence chain configuration for the estimation of each event's location in the light curve. These tools are applied to the Scorpius X-1 light curves presented in Chang et al. (2007), providing additional evidence based on the time series that the events detected thus far are most likely not occultations by TNOs.
Alcock Charles R.
Blocker Alexander W.
Protopapas Pavlos
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