2014/11/19 by Daniel del Ser, D. del Ser, del Ser, D. +12
Decision Sciences · Engineering · Physics and Astronomy · #Earth and Planetary Astrophysics (astro-ph.EP) #Energy Load and Power Forecasting #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Stock Market Forecasting Methods #astro-ph.EP #astro-ph.IM
paper · pdf · doi:10.48550/arxiv.1411.5320
Proceedings of the Living Together: Planets, Hosts Stars and Binaries (Kopal 2014) Conference, held in Litomyšl, Czech Republic, September 8-12, 2014. To be edited as a special issue of the ASP Conference Series
arxiv created 2014/11/19 · openalex publication_date 2014/11/19 · arxiv updated 2014/11/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Certain instrumental effects and data reduction anomalies introduce systematic errors in photometric time-series. Detrending algorithms such as the Trend Filtering Algorithm (TFA) (Kovács et al. 2004) have played a key role in minimizing the effects caused by these systematics. Here we present the results obtained after applying the TFA, Savitszky-Golay (Savitzky & Golay 1964) detrending algorithms and the Box Least Square phase folding algorithm (Kovács et al. 2002) to the TFRM-PSES data (Fors et al. 2013). Tests performed on this data show that by applying these two filtering methods together, the photometric RMS is on average improved by a factor of 3-4, with better efficiency towards brighter magnitudes, while applying TFA alone yields an improvement of a factor 1-2. As a result of this improvement, we are able to detect and analyze a large number of stars per TFRM-PSES field which present some kind of variability. Also, after porting these algorithms to Python and parallelizing them, we have improved, even for large data samples, the computing performance of the overall detrending+BLS algorithm by a factor of ∼10 with respect to Kovács et al. (2004).