Users pay a small fee for their data, and the income goes to the Fairborn Observatory, a non-profit corportation which runs the Phoenix 10 and other robotic telescopes at the Automatic Photometric Telescope Observatory. The Phoenix 10 observes in the Johnson UBV system using a diaphragm 60 arc sec in diameter and integrations of 10 seconds. Stars are observed in groups of three. A group consists of the varible star and a comparison star no more than 1 degree away and of roughly the same magnitude and color. A check star no more than 3 degress from the variable is also observed.
Users are responsible for selecting appropriate comparison and check stars.
A single group observation consists of a variable minus comparison and a check minus comparison magnitude difference in the UBV filter bands. For further information about observing with the Phoeni 10, send email to Prof. Michael Seeds.