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THE BIMA PROJECT: O-C DIAGRAMS OF ECLIPSING BINARY SYSTEMS

  • HAANS, G.K. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • RAMADHAN, D.G. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • AKHYAR, S. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • AZALIAH, R. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • SUHERLI, J. (Astronomy Department, Wesleyan University) ;
  • IRAWATI, P. (National Astronomical Research Institute of Thailand) ;
  • SAROTSAKULCHAI, T. (National Astronomical Research Institute of Thailand) ;
  • ARIFIN, Z.M. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • RICHICHI, A. (National Astronomical Research Institute of Thailand) ;
  • MALASAN, H.L. (Astronomy Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung) ;
  • SOONTHORNTHUM, B. (National Astronomical Research Institute of Thailand)
  • Received : 2014.11.30
  • Accepted : 2015.06.30
  • Published : 2015.09.30
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Abstract

The Eclipsing Binaries Minima (BIMA) Monitoring Project is a CCD-based photometric observational program initiated by Bosscha Observatory - Lembang, Indonesia in June 2012. Since December 2012 the National Astronomical Research Institute of Thailand (NARIT) has joined the BIMA Project as the main partner. This project aims to build an open-database of eclipsing binary minima and to establish the orbital period of each system and its variations. The project is conducted on the basis of multisite monitoring observations of eclipsing binaries with magnitudes less than 19 mag. Differential photometry methods have been applied throughout the observations. Data reduction was performed using IRAF. The observations were carried out in BVRI bands using three different small telescopes situated in Indonesia, Thailand, and Chile. Computer programs have been developed for calculating the time of minima. To date, more than 140 eclipsing binaries have been observed. From them 71 minima have been determined. We present and discuss the O-C diagrams for some eclipsing binary systems.

Keywords

References

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