Astron. Astrophys. Suppl. Ser.
Volume 125, Number 2, October II 1997
|Page(s)||337 - 341|
|Published online||15 October 1997|
New variable stars in the globular cluster NGC 288*,**
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw
2 Carnegie Observatories, Las Campanas Observatory, La Serena, Cailla 601, Chile
Send offprint request to: J. Kaluzny
Accepted: 22 January 1997
We report discovery of 3 new faint variables in the globular cluster NGC 288: 2 SX Phe stars and 1 contact binary. Both SX Phe variables are blue stragglers. The contact binary is located below cluster turnoff, slightly to the red of the main sequence. New photometry of 6 previously known variables is also presented. We note that 26 out of a total 43 SX Phe stars identified recently in ω Cen and NGC 288 exhibit V-band light curves with full amplitudes smaller than 0.10 mag. The sample of known SX Phe stars is likely to be significantly incomplete in regard to the low amplitude variables.
Key words: globular clusters: individual: NGC 288 / stars: variables: other / blue stragglers / stars: horizontal-branch / binaries: close
Based on observations collected at Las Campanas Observatory of the Carnegie Institution of Washington.
Tables 2-11 are available only in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (188.8.131.52) or via http: //cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 1997