I   OBJECT              AIRMASS
 21             FLAT_OFF  1.413
 22             FLAT_OFF  1.413
 23             FLAT_OFF  1.413
 24             FLAT_OFF  1.413
 25             FLAT_OFF  1.413
 26             FLAT_OFF  1.413
 27             FLAT_OFF  1.413
 28             FLAT_OFF  1.413
 29             FLAT_OFF  1.413
 30             FLAT_OFF  1.413