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1 results

  • Multicolor CCD photometry of the open cluster NGC 752

  • Stanislava Bartašiūtė, Robert Janusz, Richard P. Boyle, A. G. Davis Philip, Viktoras Deveikis
  • Journal:
    Proceedings of the International Astronomical Union / Volume 5 / Issue S266 / August 2009
    Published online by Cambridge University Press:
    18 January 2010, pp. 361-364
    Print publication:
    August 2009
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  • We obtained CCD observations of the open cluster NGC 752 with the 1.8m Vatican Advanced Technology Telescope (Mt. Graham, Arizona) with a 4K CCD camera and eight intermediate-band filters of the Stromvil (Strömgren + Vilnius) system. Four 12′ × 12′ fields were observed, covering the central part of the cluster. The good-quality multicolor data made it possible to obtain precise estimates of distance moduli, metallicity and foreground reddening for individual stars down to the limiting magnitude, V = 17.5, enabling photometric identification of faint cluster members. The new observations provide an extension of the lower main sequence to three magnitudes beyond the previous (photographic) limit. A relatively small number of photometric members identified at fainter magnitudes seems to be indicative of actual dissolution of the cluster from the low-mass end.