GEOS members divide the variable star observation program into three parts for greater efficiency: the Priority Program, the Routine Program, and the Prospecting Program. Observations in all three programs are welcomed.
GEOS Observation Program
Priority Program
This program focuses on stars that deserve special attention for potential publication. Today, the emphasis is on CCD photometry, DSLR techniques, and other advanced methods, which provide precise and scientifically valuable data
In visual observations, collaborative work is essential: several observers combining their datasets enable robust analysis using GEOS statistical algorithms in order to achieve reliable results.
Prospecting Program
Observation of under-studied stars to assess their scientific interest. This program is not predefined and remains at the initiative of an observer or a small group seeking volunteers for joint observations and new data production.
There are no restrictions on the types of variable stars observed, and innovative photometric techniques are highly encouraged. Visual observations can still play a role here, especially for initial exploration, but photometry is strongly recommended for meaningful results.
Routine Program
A long-term monitoring program for stars likely to show changes in behavior or for which no short-term publication is expected (Cepheids, SR and L types, Mira variables, etc.). While visual estimates were once the standard, instrumental photometry is now preferred to ensure accuracy and continuity.
This program also includes “tourist stars,” observed simply for the pleasure of the visual observer.