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Standard Stars: CCD Photometry, Transformations and Comparisons

Published online by Cambridge University Press:  05 March 2013

Hwankyung Sung  and
Michael. S. Bessell
Hwankyung Sung
Affiliation:
Bohyun-san Optical Astronomy Observatory, Yeongcheon 770-820, Korea; sungh@boao.re.kr
Michael. S. Bessell
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Private Bag, Weston Creek PO, ACT 2611, Australia
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Abstract

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We discuss variations of the atmospheric extinction coefficients and transformation equations to the standard UBVRI system based on observations of standard stars during 1996–1997 at Siding Spring Observatory using a thinned SITe CCD and coloured glass filters. In the transformation from the initial natural system to the Landolt version of the standard system, a large nonlinear term related to the Balmer discontinuity was required for the U transformation. We then modified the U filter, and the subsequent transformation to the SAAO version of the standard UBVRI system had only small nonlinear correction terms for U, B, and I. The correction terms relating to U and B are evidently due to the Balmer discontinuity, while that relating to I seems to be due to the Paschen discontinuity at λ ≈ 8200 Å. We also compared the results with Landolt's observations, and confirmed the difference between the two sets of standard stars (SAAO and Landolt).

Keywords

techniques: photometricstars: imagingstandards
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 17 , Issue 3 , 2000 , pp. 244 - 254
Copyright
Copyright © Astronomical Society of Australia 2000

References

Bessell, M. S. 1990a, PASP, 102, 1181 Google Scholar
Bessell, M. S. 1990b, A&AS, 83, 357 Google Scholar
Bessell, M. S. 1995, PASP, 107, 672 CrossRefGoogle Scholar
Cousins, A. W. J. 1984a, South Africa Astron. Observatory Circ., No. 8, 59 Google Scholar
Cousins, A. W. J. 1984b, South Africa Astron. Observatory Circ., No. 8, 69 Google Scholar
Cousins, A. W. J., & Caldwell, J. A. R. 1998, Observatory, 118, 85 Google Scholar
Graham, J. A. 1982, PASP, 94, 244 CrossRefGoogle Scholar
Kilkenny, D., van Wyk, F., Roberts, G., Marang, F., & Cooper, D. 1998, MNRAS, 294, 93 Google Scholar
Kim, S.-L., Sung, H., & Lee, S.-G. 1997, Inf. Bull. Var. Stars, No. 4466Google Scholar
Landolt, A. U. 1973, AJ, 78, 959 Google Scholar
Landolt, A. U. 1983, AJ, 88, 439 Google Scholar
Landolt, A. U. 1992, AJ, 104, 340 CrossRefGoogle Scholar
Menzies, J. W. 1993, in Precision Photometry, ed. D. Kilkenny, E. Lastovica & J. W. Menzies (Cape Town: SAAO), p. 35 Google Scholar
Menzies, J. W., Cousins, A. W. J., Banfield, R. M., & Laing, J. D. 1989, South Africa Astron. Obs. Circ., No. 13, 1 Google Scholar
Menzies, J. W., Marang, F., Laing, J. D., Coulson, I. M., & Engelbrecht, C. A. 1991, MNRAS, 248, 642 Google Scholar
Sung, H., Bessell, M. S., & Lee, S.-W. 1998, AJ, 115, 734 CrossRefGoogle Scholar