Comparison of the period detection algorithms based on Pi of the Sky data

Rafał Opiela; Lech Mankiewicz; Aleksander Filip Żarnecki

doi:10.1117/12.2205914

11 September 2015 Comparison of the period detection algorithms based on Pi of the Sky data

Rafał Opiela, Lech Mankiewicz, Aleksander Filip Żarnecki

Proceedings Volume 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015; 96621A (2015) https://doi.org/10.1117/12.2205914
Event: XXXVI Symposium on Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments (Wilga 2015), 2015, Wilga, Poland

Abstract

The Pi of the Sky is a system of five autonomous detectors designed for continuous observation of the night sky, mainly looking for optical flashes of astrophysical origin, in particular for Gamma Ray Bursts (GRB). In the Pi of the Sky project we also study many kinds of variable stars (periods in range of 0.5^d - 1000.0^d) or take part in the multiwavelength observing campaigns, such as the DG Cvn outburst observations. Our wide field of view robotic telescopes are located in San Pedro the Atacama Observatory, Chile and INTA El Arenosillo Observatory, Spain and were designed for monitoring a large fraction of the sky with 12^m -13^m range and time resolution of the order of 1 - 10 seconds. During analysis of the variable stars observations very important is accurate determination of their variability parameters. We know a lot of algorithms which can be used to the variability analysis of the observed stars¹²³ . In this article using Monte Carlo analysis we compare all used by us the period detection algorithms dedicated to the astronomical origin data analysis. Based on the tests performed we show which algorithm gives us the best period detection quality and try to derived approximate formula describing the period detection error. We also give some examples of this calculation based on the observed by our detectors variable stars. At the end of this article we show how removing bad measurements from the analysed light curve affect to the accuracy of the period detection.

Citation Download Citation

Rafał Opiela, Lech Mankiewicz, and Aleksander Filip Żarnecki "Comparison of the period detection algorithms based on Pi of the Sky data", Proc. SPIE 9662, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2015, 96621A (11 September 2015); https://doi.org/10.1117/12.2205914

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KEYWORDS

Detection and tracking algorithms

Stars

Error analysis

Monte Carlo methods

Statistical analysis

Algorithm development

Observatories

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