Rich regular frequency patterns were found in the Fourier spectra of low-amplitude delta Scuti stars observed by CoRoT satellite (see Papar\'o et al. 2016a,b). The CoRoT observations are, however, influenced by the disturbing effect of the South Atlantic Anomaly. The effect is marginal for high amplitude variable stars but it could be critical in the case of low amplitude variables, especially if the frequency range of the intrinsic variation overlaps the interval of the instrumental frequencies. Some tests were carried out both on synthetic and real data for distinguishing technical and stars' frequencies.
@article{arxiv.1604.00256,
title = {How to separate the low amplitude delta Scuti variation from the instrumental ones in CoRoT data?},
author = {J. M. Benkő and M. Paparó},
journal= {arXiv preprint arXiv:1604.00256},
year = {2016}
}
Comments
3 pages, 2 figures, to appear in proceedings of XXIX IAU GA "Astronomy in Focus" Vol. 1 as part of FM 17, "Advances in Stellar Physics from Asteroseismology"