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targetpos: Target catalog coordinates
The coordinates for the target given in the FITS headers are extracted either (i) from the catalog prepared beforehand by the observer or (ii) from the values entered manually by the observer immediately prior to making an exposure. These coordinates were used by the TACOS reduction software to calculate the barycentric velocity correction. Proper motion values were needed for very accurate results on fast-moving stars. In case the difference between catalog and telescope coordinates was larger than 1m45s a warning was issued in the reduction window.

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