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Variable Stars in the Large Magellanic Cloud: Discovery of Extragalactic W UMa Binaries
Janusz Kaluzny, Stefan Mochnacki, Slavek M. Rucinski
We observed a field in the disk of the LMC on two consecutive nights in search of rapid variable stars. We have found two pulsating stars of type RRab and delta Sct, and four binar…
CCD photometry of distant open clusters NGC 2425, Haffner 10 and Czernik 29
P. Pietrukowicz, J. Kaluzny, W. Krzeminski
We present BVI photometry for poorly known southern hemisphere open clusters: NGC 2425, Haffner 10 and Czernik 29. We have calculated the density profile and established the number…
Cluster AgeS Experiment (CASE): Dwarf Novae and a Probable Microlensing Event in the Globular Cluster M22
P. Pietrukowicz, J. Kaluzny, I. B. Thompson +4
We report the identification of a new cataclysmic variable (denoted as CV2) and a probable microlensing event in the field of the globular cluster M22. Two outbursts were observed…
Photometric study of the variable star population in the globular cluster NGC 6397
J. Kaluzny, I. B. Thompson, W. Krzeminski
We present the results of a photometric survey for variable stars in the central region of the nearby globular cluster NGC 6397.Time series photometry was obtained for 30 variable…
Cluster AgeS Experiment (CASE): Detection of a dwarf nova in the globular cluster M55
J. Kaluzny, P. Pietrukowicz, I. B. Thompson +4
We report the detection of a dwarf nova (DN) in the core region of the globular cluster M55. Six outbursts were observed during 8 observing seasons spanning the period 1997-2004. T…