Web Publications

CX Lyrae 2008 Observing Campaign

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Pierre de Ponthière

15 Rue Pre Mathy, Lesve, Profondeville, 5170, Belgium

Jean-François Le Borgne

GEOS (Groupe Européen d'Observations Stellaires), 23 Parc de Levesville, 28300 Bailleau l'Evêque, France
and
Laboratoire d'Astrophysique de Toulouse-Tarbes, Observatoire Midi- Pyrénées (CNRS/UPS), Toulouse, France

F. -J. Hambsch

GEOS (Groupe Européen d'Observations Stellaires), 23 Parc de Levesville, 28300 Bailleau l'Evêque, France Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV), Germany
and
Vereniging Voor Sterrenkunde, Werkgroep Veranderlijke Sterren (VVS), Belgium

Received February 25, 2009; revised May 22, 20009; accepted July 7, 2009

Abstract
The Blazhko effect in CX Lyr has been reported for the first time by Le Borgne et al. (2007). The authors have pointed out that the Blazhko period was not evaluated accurately due to dataset scarcity. The possible period values announced were 128 or 227 days. A newly conducted four-month observing campaign in 2008 (fifty-nine observation nights) has provided fourteen times of maximum. From a period analysis of measured times of maximum, a Blazhko period of 62 ± 2 days can be suggested. However, the present dataset is still not densely sampled enough to exclude that the measured period is still a modulation of the real Blazhko period. Indeed the shape of the (O–C) curve does not repeat itself exactly during the campaign duration.