Big Signals, Small Signals, Systematics
arXiv:1804.01894
Abstract
We examine the role of instrumental systematics in the search for small amplitude signal components in the presence of large amplitude signals. Current analyses of variable stars dealing with the above situation seem to ignore the effects of systematics, albeit the consideration of systematics is quite routine in the field of extrasolar planets. We show that simultaneous filtering of the large amplitude component and the systematics leads to residuals with much better potentials to detect any hidden small amplitude components. The method is illustrated by selected examples from the Kepler database.
Contributed paper presented at a conference "Revival of the Classical Pulsators: from Galactic Structure to Stellar Interior Diagnostics", held in Niepolomice, Poland, 17-21 September 2017. To appear in the Proceedings of the Polish Astronomical Society. Editors: Radek Smolec, Karen Kinemuchi, Richard Anderson
References in corpus (6)
- A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
- Precise time-series photometry for the Kepler-2.0 mission
- Frequency analysis of Cepheids in the Large Magellanic Cloud. New types of classical Cepheid pulsators
- MOST photometry of the RRd Lyrae variable AQ Leo: Two radial modes, 32 combination frequencies, and beyond
- The Kepler Cepheid V1154 Cyg revisited: light curve modulation and detection of granulation
- On the connection between almost periodic functions and Blazhko light curves