PG 2303+243 is a cool DA variable (also called ZZ Ceti) star with a rich pulsation spectrum and variable amplitudes. A mini-campaign involving six observatories yielded time-resolved photometric measurements of PG 2303+243 during the period 2004 September 5–20. A duty cycle of 35 per cent was achieved. We detected 24 possible independent frequencies, their amplitudes and phases for future mode identification. We confirm the occurrence of short-term amplitude and frequency variations. Our analysis suggests an l= 1 rotational splitting around 8.4 μHz, implying a rotation period of 16.5 h.


Physics, Astronomy, and Materials Science

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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2011 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.


stars individual, PG 2303+243, stars variables, stars general, white dwarfs

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Pakštienė, E., J-E. Solheim, G. Handler, M. Reed, Zs Bognár, F. Rodler, M. Paparó, J. Zdanavičius, B. Steininger, and G. Wolf. "The cool ZZ Ceti star PG 2303+ 243: observations and analysis of variability in 2004." Monthly Notices of the Royal Astronomical Society 415, no. 2 (2011): 1322-1333.

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Monthly Notices of the Royal Astronomical Society