A&A Supplement Series, Vol. 125, October II 1997, 337-341
Received January 20; accepted January 22, 1997
J. Kaluzny - W. Krzeminski
-
M. Nalezyty
Send offprint request: J. Kaluzny
Warsaw University Observatory, Al. Ujazdowskie 4,
00-478 Warsaw, Poland
e-mail: (jka,nalezyty)@sirius.astrouw.edu.pl
Carnegie Observatories, Las Campanas Observatory, La Serena, Cailla 601,
Chile
e-mail: wojtek@roses.ctio.noao.edu
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 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
.
keywords: globular clusters: individual: NGC 288 -- stars: variables: other -- blue stragglers -- stars: horizontal-branch -- binaries: close