1.3m Observations of General-Purpose Photometric Standards
General-purpose photometric standards are observed every photometric night on the 1.3m telescope.
The procedure is as follows:
Each photometric night, 1 Landolt field is observed ONCE in all optical filters. In addition, 2 IR standards (one blue and one red) are observed ONCE in all IR filters. Each standard field is observed at its best airmass.
Once a month, more thorough observations of the same standards are performed,
observing each of the 3 standard fields (1 Landolt, 2 IR fields) at 3 different airmasses.
These standards are available to all users and are not charged against your allocation. We do our best to choose those Landolt fields with at least 3 standard stars available in the field of view. If your program requires additional standard observations, please include them in your PhaseII submission. Additional observations are charged against your allocation.
For details on how photometric zeropoints and coefficients are calculated, please see Photometric Measurements.