LRIS Astrometry As Of April 2007
نویسندگان
چکیده
In this document we present fits for the distortion of the LRIS-R and LRIS-B instrument focal plane applicable to the determination of astrometric coordinates from imaeges taken with the LRIS at the Keck I Telescope. Coefficients were determined for LRIS-R and LRIS-B with the ADC in use and without the ADC in the beam based on images taken in the time period Jan. to March, 2007. These are utilized in the latest version (version 3.0) of the program COORDINATES. The last section contains for warnings regarding the various instrumental configurations of LRIS, the epochs at which astrometric fits for LRIS were carried out, and other relevant issues.
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