WSO-UV project guide star catalogue: experimental verification of its photometric system |
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| Authors: | A S Shugarov N V Chupina A E Piskunov N V Kharchenko |
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| Institution: | 1.Institute of Astronomy,Russian Academy of Sciences,Moscow,Russia;2.Main Astronomical Observatory,National Academy of Sciences of Ukraine,Kiev,Ukraine |
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| Abstract: | Precise pointing and stabilization of the T-170M telescope (World Space Observatory Ultraviolet, WSO-UV project) is provided
by the Fine Guidance System (FGS) that uses a guide star catalogue (Master Catalogue). To verify the photometric system of
the Master Catalogue we have carried out ground based observations with a CCD-camera in a spectral band, close to that of
FGS. We have found, that the photometric quality of the Master Catalogue is sufficient for FGS operations. The mean photometric
error in the range of 14–17 mag is ±0.23 mag; its variation over the sky does not exceed the factor of two. 2% of stars from
the Master Catalogue have photometric errors higher than 2 mag. We have also found a correlation between large photometric
errors and the Master Catalogue flags. |
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