• Title/Summary/Keyword: CCD photometry

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DEVELOPMENT OF SYSTEM SOFTWARE FOR ASTRONOMICAL OBSERVATIONS BY CCD PHOTOMETRIC SYSTEM IN ASTRONOMICAL OBSERVATORY OF KYUNG HEE UNIVERSITY (CCD를 이용한 경희대학교 천문대 관측시스템 소프트웨어개발)

  • Jin, Ho;Kim, Gap-Seong
    • Publications of The Korean Astronomical Society
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    • v.9 no.1
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    • pp.101-110
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    • 1994
  • We have investigated intensively an optical telescope with 76cm diameter and CCD camera system in astronomical observatory of Kyung Hee university, in order to maximize instrumental functions of our observational equipments and to construct a more reliable photometric system. And computer softwares AUTO DOME, KH CCD and KH PHO for astronomical image observations and their automatic photometries with high accuracy have been made for observers w use our observational system conveniently and efficiently. Throughout careful examinations of these programs, it has been proved that the observing time by our program is shorter than that by manual operations, so that, fast and accurate observations can be executed with ease. For open cluster NGC 7063 observed with S/N value of 350 or more by KH PHO, we have found the magnitude measurements of 11 object stars would show 0.007 magnitude difference, comparing with magnitude data from IRAF/APPHOT. From automatic photometry of eclipsing binary, AB And observed by our software, total 220 data points with good quality have been acquired during 8 hours and so we could make a better light curve than that obtained from any observational results by domestic photoelectric photometry system.

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CCD Photometry of the Asteroid 55 Pandora (소행성 55 Pandoro의 CCD 측광 연구)

  • Kwon, Sun-Gill;Kim, Seung-Lee;Lee, Ho;Jeon, Young-Beom;Park, Hong-Suh
    • Journal of the Korean earth science society
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    • v.28 no.4
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    • pp.491-496
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    • 2007
  • We performed R band time-series CCD photometric observations of the 55 Pandora for 2 nights using the 0.6 m telescope equipped with 2K CCD camera at SOAO (Sobaeksan Optical Astronomical Observatory). From the observation we determined its rotation period $P=0.^d2007=4.^h8168$, and maximum amplitude $0.281\;{\pm}\;0.001$. We also derived the pole position ${\lambda}_p(^o)=342$, ${\beta}_p(^o)=64$, and the shape parameter a/b = 1.27, b/c = 1.31 by applying Amplitude-Magnitude method.

SEARCHING MINOR PLANETS AND PHOTOMETRIC QUALITY OF 60cm REFLECTOR IN GIMHAE ASTRONOMICAL OBSERVATORY (김해천문대 60cm 반사망원경의 측광성능 분석과 소행성 탐사)

  • Lee, Sang-Hyun;Kang, Yong-Woo;Lee, Kyung-Hoon
    • Journal of Astronomy and Space Sciences
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    • v.24 no.3
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    • pp.209-218
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    • 2007
  • In this paper, we have presented the observational result for the photometric quality of main telescopes in Gimhae Astronomical Observatory. Also we performed the observation of searching new minor planets as competitive work in public observatories. The observation was carried out using 60cm telescope of Gimhae Astronomical Observatory on 2007 January 13. And, $Sch\ddot{u}ler$ BVI filters and 1K CCD camera (AP8p) were used. To define the quality of CCD photometry, we observed the region of well-known standard stars in the open cluster M67. From observed data, The transformation coefficients and airmass coefficients were obtained, and the accuracy of CCD photometry was investigated. From PSF photometry, we obtained the color-magnitude diagram of M67, and considered the useful magnitude limit and the physical properties of M67. This method can be successfully used to confirm the photometric quality of main telescope in public observatories. To investigate the detection possibility of unknown object as astroid, we observed the near area of the opposition in the ecliptic plane. And we discussed the result. Our result show that it can be possible to detect minor planets in solar system brighter than $V{\sim}18.3mag$. and it can carry out photometric study brighter than V 16mag. in Gimhae Astronomical Observatory. These results imply that the public observatories can make the research work.