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A&A Supplement Series, Vol. 125, October II 1997, 343-353

Received January 3; accepted January 6, 1997

The optical gravitational lensing experiment. Variable stars in globular clusters

III. RR Lyrae stars and Pop. II Cepheids in tex2html_wrap_inline895 Centaurigif

J. Kaluznytex2html_wrap917 - M. Kubiaktex2html_wrap917 - M. Szymanskitex2html_wrap917 - A. Udalskitex2html_wrap917 - W. Krzeminskitex2html_wrap925 - M. Mateotex2html_wrap927

Send offprint request: J. Kaluzny
tex2html_wrap541  Warsaw University Observatory, Al. Ujazdowskie  4, 00-478 Warsaw, Poland e-mail: (jka,mk,msz,udalski)
tex2html_wrap541  Carnegie Observatories, Las Campanas Observatory, Casilla 601, La Serena, Chile e-mail:
tex2html_wrap543  Department of Astronomy, University of Michigan, 821 Dennison Bldg., Ann Arbor, MI 48109-1090, U.S.A. e-mail:


We present V-band photometry for 141 variable stars from the field of tex2html_wrap_inline895 Cen. All but one variables are either RR Lyr stars or Pop. II Cepheids. One object is a distant background RR Lyr star from the galactic halo. The presented sample includes 33 newly identified variables, mostly low amplitude RR Lyr stars. We identified also two Pop. II Cepheids with exceptionally low amplitudes of light variations tex2html_wrap_inline903. The presented data may be used to study period changes of tex2html_wrap_inline895 Cen variables and/or for Fourier decomposition of light curvesgif.

keywords: globular clusters: individual: NGC 5139 -- stars: variables: RR Lyr -- stars: variables: other

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