Point Source Standards

Point source standards (bright stars known to be single) will be observed at each sky location with a minimum of one per hour. PIs should select the closest single (not binary) 5-6th magnitude star from the Yale Bright Star Catalog for each science target, and a search utility is provided here.

Photometric Standards

The pipeline-processed 'Alopeke data will include photometric zero points if executed under photometric conditions and accompanied by a photometric calibrator. Note that programs wishing to do photometry must include 15 minutes (including acquisition overheads) per night for calibrators.

Astrometry

For astrometric calibration, observations of a few well-studied binary stars are carried out in twilight during the observing run and used to determine a plate scale and position angle for each camera and applied to the run as a whole, or as changes occur to the optical path.