FGS Frequently Asked Questions
Q: What filter should I use? A: ...Q: How long should my Transfer scan be? A: ...
Q: How do I find the correct reference Transfer Function for the analysis of my double star Transfer Function? A: ...
Q: What effect does the color index of the target have on the observed Transfer Function? A: ...
Q: Are reference Transfer Functions available at various colors? A: ...
Q: What is the current status of the Optical Field Angle Distortion (OFAD) calibration? A: ...
Q: What is the plate scale (magnification) of FGS 3? A: ...
Q: How precise is my Position Mode measurement? A: ...
Q: How long does my Position Mode exposure time need to be? A: ...
Q: How precise are the parameters of my double star as measured in Transfer Mode? A: ...
Q: How faint can Guide Stars be? A: ...
Q: What filter(s) are used for guiding? A: ...
Q: What photometric information is available from the guiding FGSs regarding the photometry of the Guide Stars? A: ...
Q: The values for the PROLV3 keyword in the *.A3H file and the PA_V3 keyword in the *.DMH file should add up to 360, but they don't for my data. Which is correct? A: ...