Computer Science
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..14e..25h&link_type=abstract
Modelling Dense Stellar Systems, 26th meeting of the IAU, Joint Discussion 14, 22-23 August 2006, Prague, Czech Republic, JD14,
Computer Science
Scientific paper
The results of recent observations of open clusters are presented. Star clusters especially a compact ones (with diameter of few to ten arcmin) are suitable targets to search of light variability as well as to carry out a precise photometry for an orchestra of stars by means of ordinary Cassegrain telescope plus CCD system. A special patroling with short time-fixed exposures and mmag accuracy could be used also to study of stellar oscillation for group of stars simultaneously. The exoplanet transit events detection might be as a by-product of a long-term monitoring of such clusters as well. The program of open star clusters monitoring with Zeiss 1 meter RCC telescope of Maidanak observatory recently automated is described. In combination with quite good seeing at this observatory (see, e.g., Sarazin, M. 1999, URL http://www.eso.org/gen-fac/pubs/astclim/) the automatic telescope equipped with a large-format (2KX2K) CCD camera AP-10 available will allow to collect homogenious time-series for analysis. This program was started in 2001. With colleagues from NCU(Taiwan) we have observed the young open cluster NGC 6823 embedded into the nebula NGC 6820 and had a set of patrol observations with Zeiss 0.6 meter telescope with AP-10 camera in 2003. 7 compact open clusters in the Milky Way (NGC 7801, King1, King 13, King18, King20, Berkeley 55, IC 4996) have been monitored for stellar variability and some results of photometry will be presented. A few interesting variables were discovered and dozens were suspected for variability to the moment in these clusters for the first time. It is shown how observations like these could feasibly be used to look for exoplanet search.
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