Multiyear and multisite photometric campaigns on the bright high-amplitude pulsating subdwarf B star EC 01541-1409
- Reed, M. D.
- Kilkenny, D.
- O&apos
- Ostensen, R. H.
- Honer, C.
- Gilker, J. T.
- Quint, A. C.
- Doennig, A. M.
- Hicks, L. H.
- Thompson, M. A.
- McCart, II, P. A.
- Zietsman, E.
- Chen, W.-P.
- Chen, C.-W.
- Lin, C.-C.
- Beck, P.
- Degroote, P.
- Barlow, B. N.
- Reichart, D. E.
- Nysewander, M. C.
- LaCluyze, A. P.
- Ivarsen, K. M.
- Haislip, J. B.
- Baran, A
- Winiarski, M.
- Drozdz, M.
Publication date
January 2012
DOIAbstract
We present follow-up observations of the pulsating subdwarf B (sdB) star EC 01541–1409 as part of our efforts to resolve pulsation spectra for use in asteroseismological analyses. This paper reports on data obtained from a single-site campaign, during 2008, and a multisite campaign, during 2009. From limited 2008 data, we were able to clearly resolve and pre-whiten 24 periods. A subsequent multisite campaign spanning nearly 2 months found over 30 individual periodicities most of which were unstable in amplitude and/or phase. Pulsation amplitudes were found to the detection limit, meaning that further observations would likely reveal more periodicities
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