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http://dx.doi.org/10.5303/JKAS.2012.45.1.7

A Y-BAND LOOK OF THE SKY WITH 1-M CLASS TELESCOPES  

Choi, Chang-Su (CEOU/Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Im, Myung-Shin (CEOU/Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Jeon, Yi-Seul (CEOU/Astronomy Program, Department of Physics and Astronomy, Seoul National University)
Ibrahimov, Mansur (Ulugh Beg Astronomical Institute)
Publication Information
Journal of The Korean Astronomical Society / v.45, no.1, 2012 , pp. 7-17 More about this Journal
Abstract
Y-band is a broad passband that is centered at ~1 ${\mu}m$. It is becoming a new, popular window for extragalactic study especially for observations of red objects thanks to recent CCD technology developments. In order to better understand the general characteristics of objects in Y-band, and to investigate the promise of Y-band observations with small telescopes, we carried out imaging observations of several extragalactic fields, brown dwarfs, and high redshift quasars with Y-band filter at the Mt. Lemmon Optical Astronomy Observatory and the Maidanak observatory. From our observations, we constrain the bright end of the galaxy and the stellar number counts in Y-band. We also test the usefulness of high redshift quasar (z >6) selection via i - z - Y color-color diagram, to demonstrate that the i - z - Y color-color diagram is effective for the selection of high redshift quasars even with a conventional optical CCD camera installed at a 1-m class telescope.
Keywords
photometry: calibration; filter: Y-band; galaxies: quasars;
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