Imaging

An upgrade is being made of the list of photometric standard fields for ALFOSC based on the updated version of the Landolt catalogue (AJ 137, 4186). The new catalogue has 27 Landolt fields with three or more `well' observed standard star in the ALFOSC field-of-few compared with 14 in the current catalogue. In addition, the new web-page will include a link to tables with the magnitudes from Landolt for each field, and the required integration times when observing with the UBVRI under 1 arc sec seeing are indicated.

The automatic flat fielding script to take twilight flat fields have been made more verbose and provides the measure bias level and the 90%-percentile level of the incoming flats.