For observers who wish to do their own CCD calibration, a raw archive frame is always written and is available on request. Choose stars as close to the target star as possible. Note that these stars are typically very bright, so the exposure times will be quite short. The observing file is an ordinary text file which can be generated by any text editor. File names are recycled every calendar year so the year is not imbedded in the name.
Successive submissions overwrite the preceeding files.
Keywords and Keyvalues. There are several mandatory keywords and many more optional keywords. For observing files without repeat counts, every image request will have a slash mark in the file. Conversely, an observing file without slashes requests no images. The currently supported keyword list is given in the Table below.