Volume 391, Number 1, August III 2002
|Page(s)||369 - 377|
|Section||Numerical methods and codes|
|Published online||29 July 2002|
A box-fitting algorithm in the search for periodic transits
Konkoly Observatory, PO Box 67, 1525, Budapest, Hungary
2 Wise Observatory, Tel Aviv University, Tel Aviv, 69978, Israel e-mail: email@example.com, firstname.lastname@example.org
Corresponding author: G. Kovács, email@example.com
Accepted: 4 April 2002
We study the statistical characteristics of a box-fitting algorithm to analyze stellar photometric time series in the search for periodic transits by extrasolar planets. The algorithm searches for signals characterized by a periodic alternation between two discrete levels, with much less time spent at the lower level. We present numerical as well as analytical results to predict the possible detection significance at various signal parameters. It is shown that the crucial parameter is the effective signal-to-noise ratio – the expected depth of the transit divided by the standard deviation of the measured photometric average within the transit. When this parameter exceeds the value of 6 we can expect a significant detection of the transit. We show that the box-fitting algorithm performs better than other methods available in the astronomical literature, especially for low signal-to-noise ratios.
Key words: methods: data analysis / stars: variables: general / stars: planetary systems / occultations
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.