5.4 Cycle 14 Calibration and Monitoring Program
A short summary is given for each FGS1r calibration and monitoring observation included in the Cycle 14 calibration plan. For specific information, please refer to the STScI FGS web page (under the topic FGS and Calibration Plans") and to the HST Schedule and Program Information web page:
http://www.stsci.edu/hst/scheduling/program_information
5.4.1 Active FGS1r Calibration and Monitoring Programs
- Prop 10756: Long Term Monitoring of FGS1r in Position mode
- The open cluster M35 will be observed three times per year to evaluate the stability of the FOV, plate scale, and optical field angle distortions (OFAD) in FGS1r. Products will include calibration database parameters which remove these effects in science data. Additional calibrations will be serendipitously performed as well, including (but not limited to) monitoring the FGS1r photometric calibration, lateral color (shift of a star's centroid as a function of spectral color due to FGS1r's refractive optics), and the F583W/F5ND cross filter calibration at several locations in the FOV.
- Prop 10757: Monitoring FGS1r's Interferometric Response as a Function of Spectral Color
- Unresolved stars of a variety of (B - V) colors will be observed in Transfer mode to calibrate the effect of color on a point-source S-Curve. In addition, each object will be observed in Position mode to help calibrate the POS/TRANS offset, and for the fainter stars, the F583W/F5ND cross filter offset, as a function of color. These data will provide the GO with a library of appropriate point-source templates. This proposal also monitors the temporal stability of the S-curves since the target list includes stars that have been observed in Cycles 8 and 9. The measurements from this proposal will be made at the center of the FGS FOV only.
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