Specifications for Selection of ACS for Scrapbook

MISSION:   ACS (HST)  

General goal: show ACS images in six bands: U, B, V, R, I, z.

Include all non-solar system objects with a preview which is non-proprietary. Include Wide Field Channel (WFC) and High Resolution Channel (HRC) data, but do not include Solar Blind Channel (SBC) observations. When more than one image with the same filter is available, pick WFC observations over HRC observations. Then pick the one with the longest exposure time. If that includes more than one image, pick the most recent one.

Definition of individual pointing

All observations within 50.5" from a given observing position for pointings based on the WFC observations and 7" for those based on HRC observations. Initially all observations for both cameras with in 50.5" of a WFC observation are assigned a pointing first. All HRC observations within 7" not already assigned to a pointing are then assing4ed to pointings. Observations of the same area will be more or less at the same observing position for dithering/cosmic-ray removal purposes.